chore(docs): sync CLAUDE.md with standardized template (#30)

- Add Microsoft coding guidelines reference (rule #8)
- Add perf commit type to Conventional Commit Types table
- Standardize GitHub CLI Commands section
- Update build commands to reference new solution path

Author: CalvinAllen

CLAUDE.md

@@ -13,7 +13,8 @@ This file provides guidance to Claude Code (claude.ai/code) when working with co
 5. **Branch naming** - Use format: `type/short-description` (e.g., `feat/settings-dialog`)
 6. **Working an issue** - Always create a new branch from an updated main branch
 7. **Check branch status before pushing** - Verify the remote tracking branch still exists. If a PR was merged/deleted, create a new branch from main instead
-8. **WinUI 3 for all UI** - All UI must use WinUI 3/XAML with modern styling (Fluent Design, theme resources, no hardcoded colors except brand purple #68217A)
+8. **Microsoft coding guidelines** - Follow [Microsoft C# coding conventions](https://learn.microsoft.com/en-us/dotnet/csharp/fundamentals/coding-style/coding-conventions) and [.NET library design guidelines](https://learn.microsoft.com/en-us/dotnet/standard/design-guidelines/)
+9. **WinUI 3 for all UI** - All UI must use WinUI 3/XAML with modern styling (Fluent Design, theme resources, no hardcoded colors except brand purple #68217A)
 
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@@ -36,6 +37,7 @@ gh issue close <number>
 | `refactor` | Code change that neither fixes a bug nor adds a feature |
 | `test` | Adding or updating tests |
 | `chore` | Maintenance tasks |
+| `perf` | Performance improvement |
 | `ci` | CI/CD changes |
 
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