[#1118] .forgejo: Add pre-commit action

Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>

.forgejo/workflows/pre-commit.yml

@@ -0,0 +1,25 @@
+name: Pre-commit hooks
+on: [pull_request]
+
+jobs:
+  precommit:
+    name: Pre-commit
+    env:
+      # Skip pre-commit hooks which are executed by other actions.
+      SKIP: make-lint,go-staticcheck-repo-mod,go-unit-tests,gofumpt
+    runs-on: ubuntu-22.04
+    # If we use actions/setup-python from either Github or Gitea,
+    # the line above fails with a cryptic error about not being able to found python.
+    # So install everything manually.
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set up Go
+        uses: actions/setup-go@v3
+        with:
+          go-version: 1.22
+      - name: Set up Python
+        run: |
+          apt update
+          apt install -y pre-commit
+      - name: Run pre-commit
+        run: pre-commit run --color=always --hook-stage manual --all-files