Adding code changes to integrate codeQL tool into pipeline (#769)

* code changes to add codeQL tool into pipeline

* additional change to make warnings as errors to false

* removed cron code as it's not needed

* removed redundant package restore

Author: laxmikanth-msft

.github/workflows/codeql.yml

@@ -0,0 +1,49 @@
+name: "CodeQL Analysis"
+
+on:
+  workflow_dispatch:
+  push:
+    branches: [ "main", "release/*" ]
+  pull_request:
+    branches: [ "main", "release/*" ]
+
+jobs:
+  analyze:
+    name: Analyze (C#)
+    runs-on: windows-latest
+    timeout-minutes: 120
+
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+
+    strategy:
+      fail-fast: false
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v4
+
+    - name: Setup .NET SDK
+      uses: actions/setup-dotnet@v4
+      with:
+        global-json-file: global.json
+
+    - name: Initialize CodeQL
+      uses: github/codeql-action/init@v4
+      with:
+        languages: csharp
+        queries: security-extended
+
+    - name: Restore NuGet packages
+      run: |
+        dotnet restore WPFSamples.sln
+
+    - name: Build solution
+      run: dotnet build WPFSamples.sln --configuration Release --no-restore /p:Platform="Any CPU" /p:LangVersion=latest /p:TreatWarningsAsErrors=false
+      continue-on-error: true
+    - name: Perform CodeQL Analysis
+      uses: github/codeql-action/analyze@v4
+      with:
+        category: "/language:csharp"