Update CodeQL workflow for C# analysis

Author: FRACerqueira

.github/workflows/codeql.yml

@@ -0,0 +1,42 @@
+name: "CodeQL Advanced"
+
+on: [push, pull_request]
+
+jobs:
+  analyze:
+    name: Analyze (${{ matrix.language }})
+    runs-on: ${{ (matrix.language == 'swift' && 'macos-latest') || 'ubuntu-latest' }}
+    permissions:
+      security-events: write
+      packages: read
+      actions: read
+      contents: read
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: [ 'csharp' ]
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v4
+
+    - name: Setup .NET
+      if: matrix.language == 'csharp'
+      uses: actions/setup-dotnet@v3
+      with:
+        dotnet-version: '10.0.x'
+
+    - name: Initialize CodeQL
+      uses: github/codeql-action/init@v3
+      with:
+        languages: ${{ matrix.language }}
+        queries: +security-extended,security-and-quality
+        
+    - name: Build Project
+      run: dotnet build ./src/PromptPlus.csproj -c Release
+
+    - name: Perform CodeQL Analysis
+      uses: github/codeql-action/analyze@v3
+      with:
+        category: "/language:${{matrix.language}}"