Add sample builds to GitHub PR action (#196)

Author: MarkusBillharz

.github/workflows/validate-pr.yml

@@ -26,6 +26,21 @@ jobs:
       - name: Clean Build with Gradle
         run: ./gradlew clean build
 
+      - name: Publish Build to MavenLocal  # used by the samples
+        run: ./gradlew publishToMavenLocal
+
+      - name: Build Kotlin-MCP-Client Sample
+        working-directory: ./samples/kotlin-mcp-client
+        run: ./gradlew clean build
+
+      - name: Build Kotlin-MCP-Server Sample
+        working-directory: ./samples/kotlin-mcp-server
+        run: ./gradlew clean build
+
+      - name: Build Weather-Stdio-Server Sample
+        working-directory: ./samples/kotlin-mcp-client
+        run: ./gradlew clean build
+
       - name: Disable Auto-Merge on Fail
         if: failure()
         run: gh pr merge --disable-auto "$PR_URL"