feat: this commit introduces a new pipeline to validate pull requests for the contracts project

Author: https-richardy

.github/workflows/contracts-pr-validation.yml

@@ -0,0 +1,33 @@
+name: omanda.internal.contracts pull request validation
+
+on:
+  pull_request:
+    branches: [master]
+    paths:
+      - 'Artifacts/Comanda.Internal.Contracts/**'
+
+jobs:
+  build-and-test:
+    runs-on: ubuntu-latest
+
+    defaults:
+      run:
+        working-directory: Artifacts/Comanda.Internal.Contracts
+
+    steps:
+      - name: checkout code
+        uses: actions/checkout@v4
+
+      - name: setup .NET
+        uses: actions/setup-dotnet@v4
+        with:
+          dotnet-version: '9.0.x'
+
+      - name: restore dependencies
+        run: dotnet restore
+
+      - name: build
+        run: dotnet build --no-restore --configuration Release
+
+      - name: run tests
+        run: dotnet test --no-build --configuration Release --verbosity normal