Update common files from template repo

Added files from TrueCloudLab/basic repo for pre-commit checks, CI, etc.

Signed-off-by: George Bartolomey <george@bh4.ru>

.gitattributes

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+/**/*.pb.go -diff -merge
+/**/*.pb.go linguist-generated=true

.gitlint

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+[general]
+fail-without-commits=True
+regex-style-search=True
+contrib=CC1
+
+[title-match-regex]
+regex=^\[\#[0-9Xx]+\]\s
+
+[ignore-by-title]
+regex=^Release(.*)
+ignore=title-match-regex

.golangci.yml

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+# This file contains all available configuration options
+# with their default values.
+
+# options for analysis running
+run:
+  # timeout for analysis, e.g. 30s, 5m, default is 1m
+  timeout: 10m
+
+  # include test files or not, default is true
+  tests: false
+
+# output configuration options
+output:
+  # colored-line-number|line-number|json|tab|checkstyle|code-climate, default is "colored-line-number"
+  format: tab
+
+# all available settings of specific linters
+linters-settings:
+  exhaustive:
+    # indicates that switch statements are to be considered exhaustive if a
+    # 'default' case is present, even if all enum members aren't listed in the
+    # switch
+    default-signifies-exhaustive: true
+  govet:
+    # report about shadowed variables
+    check-shadowing: false
+  staticcheck:
+    checks: ["all"]
+  funlen:
+    lines: 80 # default 60
+    statements: 60 # default 40
+  gocognit:
+    min-complexity: 40 # default 30
+
+linters:
+  enable:
+    # mandatory linters
+    - govet
+    - revive
+    - errcheck
+    - gosimple
+    - ineffassign
+    - staticcheck
+    - typecheck
+    - unused
+    - bidichk
+    - durationcheck
+    - exhaustive
+    - exportloopref
+    - gofmt
+    - goimports
+    - misspell
+    - whitespace
+
+    # extra linters
+    - godot
+    - predeclared
+    - reassign
+    - containedctx
+    - funlen
+    - gocognit
+    - contextcheck
+  disable-all: true
+  fast: false

.pre-commit-config.yaml

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+ci:
+  autofix_prs: false
+
+repos:
+  - repo: https://github.com/jorisroovers/gitlint
+    rev:  v0.19.1
+    hooks:
+      - id: gitlint
+        stages: [commit-msg]
+      - id: gitlint-ci
+
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v4.4.0
+    hooks:
+    - id: check-added-large-files
+    - id: check-case-conflict
+    - id: check-executables-have-shebangs
+    - id: check-shebang-scripts-are-executable
+    - id: check-merge-conflict
+    - id: check-json
+    - id: check-xml
+    - id: check-yaml
+    - id: trailing-whitespace
+      args: [--markdown-linebreak-ext=md]
+    - id: end-of-file-fixer
+      exclude: ".key$"
+
+  - repo: https://github.com/shellcheck-py/shellcheck-py
+    rev: v0.9.0.2
+    hooks:
+      - id: shellcheck
+
+  - repo: https://github.com/golangci/golangci-lint
+    rev: v1.51.2
+    hooks:
+      - id: golangci-lint
+
+  - repo: local
+    hooks:
+       - id: go-unit-tests
+         name: go unit tests
+         entry: make test
+         pass_filenames: false
+         types: [go]
+         language: system

CONTRIBUTING.md

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+# Contribution guide
+
+First, thank you for contributing! We love and encourage pull requests from
+everyone. Please follow the guidelines:
+
+- Check the open [issues](https://git.frostfs.info/TrueCloudLab/frostfs-node/issues) and
+  [pull requests](https://git.frostfs.info/TrueCloudLab/frostfs-node/pulls) for existing
+  discussions.
+
+- Open an issue first, to discuss a new feature or enhancement.
+
+- Write tests, and make sure the test suite passes locally and on CI.
+
+- Open a pull request, and reference the relevant issue(s).
+
+- Make sure your commits are logically separated and have good comments
+  explaining the details of your change.
+
+- After receiving feedback, amend your commits or add new ones as
+  appropriate.
+
+- **Have fun!**
+
+## Development Workflow
+
+Start by forking the `frostfs-node` repository, make changes in a branch and then
+send a pull request. We encourage pull requests to discuss code changes. Here
+are the steps in details:
+
+### Set up your Forgejo repository
+Fork [FrostFS node upstream](https://git.frostfs.info/TrueCloudLab/frostfs-node) source
+repository to your own personal repository. Copy the URL of your fork (you will
+need it for the `git clone` command below).
+
+```sh
+$ git clone https://git.frostfs.info/TrueCloudLab/frostfs-node
+```
+
+### Set up git remote as ``upstream``
+```sh
+$ cd frostfs-node
+$ git remote add upstream https://git.frostfs.info/TrueCloudLab/frostfs-node
+$ git fetch upstream
+$ git merge upstream/master
+...
+```
+
+### Create your feature branch
+Before making code changes, make sure you create a separate branch for these
+changes. Maybe you will find it convenient to name branch in
+`<type>/<Issue>-<changes_topic>` format.
+
+```
+$ git checkout -b feature/123-something_awesome
+```
+
+### Test your changes
+After your code changes, make sure
+
+- To add test cases for the new code.
+- To run `make lint` and `make staticcheck-run`
+- To squash your commits into a single commit or a series of logically separated
+  commits run `git rebase -i`. It's okay to force update your pull request.
+- To run `make test` and `make all` completes.
+
+### Commit changes
+After verification, commit your changes. This is a [great
+post](https://chris.beams.io/posts/git-commit/) on how to write useful commit
+messages. Try following this template:
+
+```
+[#Issue] <component> Summary
+
+Description
+
+<Macros>
+
+<Sign-Off>
+```
+
+```
+$ git commit -sam '[#123] Add some feature'
+```
+
+### Push to the branch
+Push your locally committed changes to the remote origin (your fork)
+```
+$ git push origin feature/123-something_awesome
+```
+
+### Create a Pull Request
+Pull requests can be created via Forgejo. Refer to [this
+document](https://docs.codeberg.org/collaborating/pull-requests-and-git-flow/) for
+detailed steps on how to create a pull request. After a Pull Request gets peer
+reviewed and approved, it will be merged.
+
+## DCO Sign off
+
+All authors to the project retain copyright to their work. However, to ensure
+that they are only submitting work that they have rights to, we are requiring
+everyone to acknowledge this by signing their work.
+
+Any copyright notices in this repository should specify the authors as "the
+contributors".
+
+To sign your work, just add a line like this at the end of your commit message:
+
+```
+Signed-off-by: Samii Sakisaka <samii@ivunojikan.co.jp>
+
+```
+
+This can easily be done with the `--signoff` option to `git commit`.
+
+By doing this you state that you can certify the following (from [The Developer
+Certificate of Origin](https://developercertificate.org/)):
+
+```
+Developer Certificate of Origin
+Version 1.1
+
+Copyright (C) 2004, 2006 The Linux Foundation and its contributors.
+1 Letterman Drive
+Suite D4700
+San Francisco, CA, 94129
+
+Everyone is permitted to copy and distribute verbatim copies of this
+license document, but changing it is not allowed.
+
+
+Developer's Certificate of Origin 1.1
+
+By making a contribution to this project, I certify that:
+
+(a) The contribution was created in whole or in part by me and I
+    have the right to submit it under the open source license
+    indicated in the file; or
+
+(b) The contribution is based upon previous work that, to the best
+    of my knowledge, is covered under an appropriate open source
+    license and I have the right under that license to submit that
+    work with modifications, whether created in whole or in part
+    by me, under the same open source license (unless I am
+    permitted to submit under a different license), as indicated
+    in the file; or
+
+(c) The contribution was provided directly to me by some other
+    person who certified (a), (b) or (c) and I have not modified
+    it.
+
+(d) I understand and agree that this project and the contribution
+    are public and that a record of the contribution (including all
+    personal information I submit with it, including my sign-off) is
+    maintained indefinitely and may be redistributed consistent with
+    this project or the open source license(s) involved.
+```