Make csharp reusable workflow

[konard]

🤖 AI-Powered Solution

This pull request solves issue #3 by converting the commented C# workflow into a functional reusable workflow.

📋 Issue Reference

Fixes #3

✅ Implementation Details

Key Changes:

• ✅ Converted commented csharp.yml workflow to functional reusable workflow
• ✅ Added workflow_call trigger with required secrets inputs:
  • NUGET_TOKEN (required)
  • GITHUB_TOKEN (required)
• ✅ Updated all actions/checkout to v3 for consistency with other workflows
• ✅ Added .NET setup steps to all jobs for proper environment setup
• ✅ Fixed typos in job names (publiseRelease → publishRelease, pusnToNuget → pushToNuget)
• ✅ Updated .NET version to 8.0.x (matching the test framework target)
• ✅ Maintained all original functionality:
  • Testing with dotnet test
  • NuGet package publishing to GitHub Package Registry
  • NuGet package publishing to nuget.org
  • Release publishing
  • Documentation generation (conditional on C# file changes)
  • PDF generation (conditional on C# file changes)

Usage Example:

name: Deploy C# Package

on:
  push:
    branches: main 
    paths:
      - 'csharp/**'
  workflow_dispatch:

jobs:
  deploy:
    uses: linksplatform/Workflows/.github/workflows/csharp.yml@main
    secrets:
      NUGET_TOKEN: ${{ secrets.NUGET_TOKEN }}
      GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

🧪 Testing

• ✅ YAML syntax validation passed
• ✅ Follows established patterns from existing reusable workflows in the repository
• ✅ Created usage example in examples/csharp-usage-example.yml

📁 Files Changed

• .github/workflows/csharp.yml - Converted from commented template to functional reusable workflow
• examples/csharp-usage-example.yml - Added usage example for documentation

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