Add GitHub Actions build workflow to fix broken Build badge

Co-authored-by: alisonlomaka <98775110+alisonlomaka@users.noreply.github.com>

Author: Copilot

.github/workflows/build.yml

@@ -0,0 +1,29 @@
+name: Build
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v4
+    
+    - name: Setup .NET
+      uses: actions/setup-dotnet@v4
+      with:
+        dotnet-version: 8.0.x
+        
+    - name: Restore dependencies
+      run: dotnet restore Microsoft.Sbom.sln
+      
+    - name: Build
+      run: dotnet build Microsoft.Sbom.sln --no-restore --configuration Release
+      
+    - name: Test
+      run: dotnet test Microsoft.Sbom.sln --no-build --configuration Release --verbosity normal
+      continue-on-error: false