Update version to 2.2.1 and add CLAUDE.md

- Updated project version from 2.2.0 to 2.2.1 in Unidecode.NET.csproj.
- Added CLAUDE.md for project guidance, covering overview, architecture, project structure, development commands, framework and dependencies, code style, and testing information.
- Included detailed sections on building, running tests, and packaging, along with descriptions of core components and testing files.

Author: thecoderok

CLAUDE.md

@@ -0,0 +1,67 @@
+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+
+## Project Overview
+
+Unidecode.NET is a .NET library that provides ASCII transliterations of Unicode text. The library converts Unicode strings to ASCII representations, useful for URL slugs, legacy system integration, and text processing where ASCII-only output is required.
+
+## Architecture
+
+### Core Components
+
+- **Unidecoder.cs** (`src/Unidecoder.cs`): Main static class containing the transliteration logic
+  - Supports two algorithms: `Fast` (optimized but limited to codepoints ≤65535) and `Complete` (proper handling of all Unicode codepoints including Chinese/Japanese)
+  - Uses embedded resource file `unidecoder-decodemap.txt` for character mappings
+  - Provides extension methods for string transliteration
+  - Configurable algorithm selection via static `Algorithm` property
+
+### Project Structure
+
+- `src/`: Main library project (Unidecode.NET.csproj)
+- `test/`: Unit tests using xUnit framework
+- `benchmark/`: Performance benchmarking project
+- `assets/`: Contains the Unicode-to-ASCII mapping data file
+
+## Development Commands
+
+### Building
+```bash
+dotnet build -c Release
+```
+
+### Running Tests
+```bash
+dotnet test -c Release --no-build
+```
+
+### Running a Single Test
+```bash
+dotnet test -c Release --filter "TestMethodName"
+```
+
+### Packaging
+```bash
+dotnet pack -c Release
+```
+
+## Framework and Dependencies
+
+- Target Framework: .NET 7.0
+- Test Framework: xUnit 2.4.1
+- No external runtime dependencies for the main library
+- Uses embedded resources for character mapping data
+
+## Code Style
+
+- Follows .editorconfig settings: UTF-8, LF line endings, 2-space indentation, max line length 160
+- XML documentation enabled for public APIs
+- Unsafe code blocks allowed for performance optimization
+
+## Testing
+
+Tests are located in `test/` directory:
+- `UnidecoderTest.cs`: Basic functionality tests
+- `CompleteUnidecoderTest.cs`: Comprehensive Unicode testing
+
+The CI/CD pipeline (GitHub Actions) automatically runs build and tests on push.

src/Unidecode.NET.csproj

@@ -9,7 +9,7 @@
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <Description>Unidecode.NET returns transliterated string</Description>
     <TargetFrameworks>net7.0</TargetFrameworks>
-    <VersionPrefix>2.2.0</VersionPrefix>
+    <VersionPrefix>2.2.1</VersionPrefix>
     <PackageTags>text;unicode;seo</PackageTags>
     <RepositoryType>git</RepositoryType>
     <PackageProjectUrl>https://github.com/thecoderok/Unidecode.NET</PackageProjectUrl>