[#33] decimal: Move Decimal to accounting

Move Decimal message definition to accounting package since it is only used
there. Package decimal is completely removed from the repository.

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>

accounting/service.proto

@@ -5,7 +5,6 @@ option csharp_namespace = "NeoFS.API.Accounting";
 
 import "service/meta.proto";
 import "service/verify.proto";
-import "decimal/decimal.proto";
 import "refs/types.proto";
 
 // Accounting is a service that provides access for accounting balance
@@ -24,7 +23,16 @@ message BalanceRequest {
     service.RequestVerificationHeader Verify = 99;
 }
 
+// Decimal represents the decimal numbers.
+message Decimal {
+    // Value carries number value.
+    int64 Value = 1;
+
+    // Precision carries value precision.
+    uint32 Precision = 2;
+}
+
 message BalanceResponse {
     // Balance contains current account balance state
-    decimal.Decimal Balance = 1;
+    Decimal Balance = 1;
 }

decimal/decimal.proto

@@ -1,13 +0,0 @@
-syntax = "proto3";
-package decimal;
-option go_package = "github.com/nspcc-dev/neofs-api-go/decimal";
-option csharp_namespace = "NeoFS.API.Decimal";
-
-// Decimal represents the decimal numbers.
-message Decimal {
-    // Value carries number value.
-    int64 Value = 1;
-
-    // Precision carries value precision.
-    uint32 Precision = 2;
-}

proto-docs/accounting.md

@@ -10,6 +10,7 @@
   - Messages
     - [BalanceRequest](#accounting.BalanceRequest)
     - [BalanceResponse](#accounting.BalanceResponse)
+    - [Decimal](#accounting.Decimal)
     
 
 - [Scalar Value Types](#scalar-value-types)
@@ -66,7 +67,19 @@ Balance returns current balance status of the NeoFS user
 
 | Field | Type | Label | Description |
 | ----- | ---- | ----- | ----------- |
-| Balance | [decimal.Decimal](#decimal.Decimal) |  | Balance contains current account balance state |
+| Balance | [Decimal](#accounting.Decimal) |  | Balance contains current account balance state |
+
+
+<a name="accounting.Decimal"></a>
+
+### Message Decimal
+Decimal represents the decimal numbers.
+
+
+| Field | Type | Label | Description |
+| ----- | ---- | ----- | ----------- |
+| Value | [int64](#int64) |  | Value carries number value. |
+| Precision | [uint32](#uint32) |  | Precision carries value precision. |
 
  <!-- end messages -->
 

proto-docs/decimal.md

@@ -1,61 +0,0 @@
-# Protocol Documentation
-<a name="top"></a>
-
-## Table of Contents
-
-- [decimal/decimal.proto](#decimal/decimal.proto)
-
-  - Messages
-    - [Decimal](#decimal.Decimal)
-    
-
-- [Scalar Value Types](#scalar-value-types)
-
-
-
-<a name="decimal/decimal.proto"></a>
-<p align="right"><a href="#top">Top</a></p>
-
-## decimal/decimal.proto
-
-
- <!-- end services -->
-
-
-<a name="decimal.Decimal"></a>
-
-### Message Decimal
-Decimal is a structure used for representation of assets amount
-
-
-| Field | Type | Label | Description |
-| ----- | ---- | ----- | ----------- |
-| Value | [int64](#int64) |  | Value is value number |
-| Precision | [uint32](#uint32) |  | Precision is precision number |
-
- <!-- end messages -->
-
- <!-- end enums -->
-
-
-
-## Scalar Value Types
-
-| .proto Type | Notes | C++ Type | Java Type | Python Type |
-| ----------- | ----- | -------- | --------- | ----------- |
-| <a name="double" /> double |  | double | double | float |
-| <a name="float" /> float |  | float | float | float |
-| <a name="int32" /> int32 | Uses variable-length encoding. Inefficient for encoding negative numbers – if your field is likely to have negative values, use sint32 instead. | int32 | int | int |
-| <a name="int64" /> int64 | Uses variable-length encoding. Inefficient for encoding negative numbers – if your field is likely to have negative values, use sint64 instead. | int64 | long | int/long |
-| <a name="uint32" /> uint32 | Uses variable-length encoding. | uint32 | int | int/long |
-| <a name="uint64" /> uint64 | Uses variable-length encoding. | uint64 | long | int/long |
-| <a name="sint32" /> sint32 | Uses variable-length encoding. Signed int value. These more efficiently encode negative numbers than regular int32s. | int32 | int | int |
-| <a name="sint64" /> sint64 | Uses variable-length encoding. Signed int value. These more efficiently encode negative numbers than regular int64s. | int64 | long | int/long |
-| <a name="fixed32" /> fixed32 | Always four bytes. More efficient than uint32 if values are often greater than 2^28. | uint32 | int | int |
-| <a name="fixed64" /> fixed64 | Always eight bytes. More efficient than uint64 if values are often greater than 2^56. | uint64 | long | int/long |
-| <a name="sfixed32" /> sfixed32 | Always four bytes. | int32 | int | int |
-| <a name="sfixed64" /> sfixed64 | Always eight bytes. | int64 | long | int/long |
-| <a name="bool" /> bool |  | bool | boolean | boolean |
-| <a name="string" /> string | A string must always contain UTF-8 encoded or 7-bit ASCII text. | string | String | str/unicode |
-| <a name="bytes" /> bytes | May contain any arbitrary sequence of bytes. | string | ByteString | str |
-