Github push formatting checks.

.github/workflows/checks.yaml

@@ -1,4 +1,4 @@
-name: Run Checks
+name: Checks
 
 on:
   push:
@@ -9,16 +9,29 @@ on:
       - 'main'
 
 jobs:
-  testing:
-    name: javamvn-unittests
+  formatting-check:
+    name: Follow Google Formatting Guidelines
     runs-on: ubuntu-latest
-
     steps:
-      - name: Checkout code
-        uses: actions/checkout@v5
+      - uses: actions/checkout@v5
+      - uses: actions/setup-java@v5
+        with:
+          java-version: '24'
+          distribution: 'temurin'
+          cache: maven
+      - name: Run Format Check
+        run: mvn spotless:check
 
-      - name: Set up JDK 24
-        uses: actions/setup-java@v5
+  tests:
+    name: Unittests
+    runs-on: ${{ matrix.os }}
+    needs: formatting-check
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+    steps:
+      - uses: actions/checkout@v5
+      - uses: actions/setup-java@v5
         with:
           java-version: '24'
           distribution: 'temurin'