Upgrade the entire workflow system.

.github/workflows/build.yml

@@ -0,0 +1,25 @@
+name: Build with Gradle
+
+on: [ push, pull_request ]
+
+jobs:
+  build:
+    runs-on: ubuntu-24.04
+    steps:
+      - name: Checkout Repository
+        uses: actions/checkout@v4
+      - name: Validate Gradle Wrapper
+        uses: gradle/actions/wrapper-validation@v3
+      - name: Set up JDK 21
+        uses: actions/setup-java@v4
+        with:
+          distribution: 'temurin'
+          java-version: 21
+          check-latest: true
+      - name: Build with Gradle
+        run: ./gradlew build
+      - name: Upload artifacts to GitHub
+        uses: actions/upload-artifact@v4
+        with:
+          name: MidnightControls-Artifacts
+          path: /build/libs/