add codeql.yml and global.json files

Author: ddidgdimitrov-infragistics

.github/workflows/codeql.yml

@@ -0,0 +1,36 @@
+name: CodeQL
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  analyze:
+    name: CodeQL Analysis
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Setup .NET 9
+        uses: actions/setup-dotnet@v4
+        with:
+          dotnet-version: '9.0.x'
+
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v3
+        with:
+          languages: csharp
+          build-mode: manual
+
+      - name: Restore
+        run: dotnet restore
+
+      - name: Build
+        run: dotnet build --configuration Release
+
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@v3

global.json

@@ -0,0 +1,5 @@
+{
+  "sdk": {
+    "version": "9.0.203"
+  }
+}