Add git commit message convention under .github (#789)

Agent-Logs-Url: https://github.com/irihitech/Semi.Avalonia/sessions/ccdc8843-c9ae-4277-89e1-f25308ba3eaf

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: rabbitism <14807942+rabbitism@users.noreply.github.com>

.editorconfig

@@ -198,7 +198,7 @@ dotnet_diagnostic.AVA2001.severity = warning
 
 # Xaml files
 [*.{xaml,axaml}]
-indent_size = 2
+indent_size = 4
 # DuplicateSetterError
 avalonia_xaml_diagnostic.AVLN2203.severity = warning
 # StyleInMergedDictionaries

.github/COMMIT_CONVENTION.md

@@ -0,0 +1,92 @@
+# Git Commit Message Convention
+
+This project follows the [Conventional Commits](https://www.conventionalcommits.org/) specification for commit messages.
+
+## Format
+
+```
+<type>[optional scope]: <description>
+
+[optional body]
+
+[optional footer(s)]
+```
+
+## Types
+
+| Type | Description |
+|------|-------------|
+| `feat` | A new feature |
+| `fix` | A bug fix |
+| `docs` | Documentation only changes |
+| `style` | Changes that do not affect the meaning of the code (formatting, missing semicolons, etc.) |
+| `refactor` | A code change that neither fixes a bug nor adds a feature |
+| `perf` | A code change that improves performance |
+| `test` | Adding missing tests or correcting existing tests |
+| `build` | Changes that affect the build system or external dependencies |
+| `ci` | Changes to CI configuration files and scripts |
+| `chore` | Other changes that don't modify source or test files |
+| `revert` | Reverts a previous commit |
+
+## Rules
+
+1. **Limit the subject line to 50 characters** (72 character hard limit)
+2. **Use the imperative mood** in the subject line (e.g., "add feature" not "added feature")
+3. **Do not end the subject line with a period**
+4. **Use lowercase** for the description (e.g., "add feature" not "Add feature")
+5. **Separate subject from body with a blank line**
+6. **Wrap the body at 72 characters**
+7. **Use the body to explain what and why**, not how
+8. **Reference issues and pull requests** in the footer
+
+## Scope
+
+The scope should be the name of the package or area affected (e.g., `button`, `datepicker`, `theme`, `demo`).
+
+## Examples
+
+### Simple commit
+
+```
+feat(button): add loading state support
+```
+
+### Commit with body
+
+```
+fix(datepicker): correct month navigation overflow
+
+When navigating past December, the month index wrapped to a
+negative value instead of rolling over to January of the next year.
+```
+
+### Commit with breaking change
+
+```
+feat(theme)!: rename SemiColorPrimary to SemiColorBrand
+
+BREAKING CHANGE: The token SemiColorPrimary has been renamed to
+SemiColorBrand. Update all references in your custom theme files.
+```
+
+### Commit referencing an issue
+
+```
+fix(textbox): placeholder not visible in dark mode
+
+Closes #123
+```
+
+## Breaking Changes
+
+Breaking changes must be indicated by appending a `!` after the type/scope, or by including a `BREAKING CHANGE:` footer. Both methods may be used together.
+
+## Revert Commits
+
+When reverting a previous commit, use the `revert` type and reference the reverted commit SHA in the footer:
+
+```
+revert: feat(button): add loading state support
+
+Revert commit a1b2c3d.
+```

demo/Directory.Packages.props

@@ -2,7 +2,7 @@
     <PropertyGroup>
         <ManagePackageVersionsCentrally>true</ManagePackageVersionsCentrally>
         <AvaloniaVersion>12.0.1</AvaloniaVersion>
-        <DataGridVersion>12.0.1</DataGridVersion>
+        <DataGridVersion>12.0.0</DataGridVersion>
         <SkiaSharpVersion>3.119.3-preview.1.1</SkiaSharpVersion>
     </PropertyGroup>
     <ItemGroup>
@@ -23,4 +23,4 @@
 
         <PackageVersion Include="CommunityToolkit.Mvvm" Version="8.4.2"/>
     </ItemGroup>
-</Project>
+</Project>

src/Directory.Packages.props

@@ -2,7 +2,7 @@
     <PropertyGroup>
         <ManagePackageVersionsCentrally>true</ManagePackageVersionsCentrally>
         <AvaloniaVersion>12.0.1</AvaloniaVersion>
-        <DataGridVersion>12.0.1</DataGridVersion>
+        <DataGridVersion>12.0.0</DataGridVersion>
     </PropertyGroup>
     <ItemGroup>
         <PackageVersion Include="Avalonia" Version="$(AvaloniaVersion)"/>
@@ -11,4 +11,4 @@
         <PackageVersion Include="Avalonia.Controls.TreeDataGrid" Version="11.1.1"/>
         <PackageVersion Include="Irihi.Avalonia.Shared" Version="0.4.0"/>
     </ItemGroup>
-</Project>
+</Project>

src/Semi.Avalonia.DataGrid/Semi.Avalonia.DataGrid.csproj

@@ -2,8 +2,8 @@
 
     <PropertyGroup>
         <TargetFrameworks>net8.0;net10.0</TargetFrameworks>
-        <Version>12.0.1</Version>
-        <PackageReleaseNotes>Update to Semi.Avalonia.DataGrid 12.0.1</PackageReleaseNotes>
+        <Version>12.0.0</Version>
+        <PackageReleaseNotes>Update to Semi.Avalonia.DataGrid 12.0.0</PackageReleaseNotes>
         <Title>Semi.Avalonia.DataGrid</Title>
     </PropertyGroup>