Adds an example github action that confirms the mod is building and working.

.github/workflows/gradle.yml

@@ -0,0 +1,22 @@
+name: Verifying Everything Compiles
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+    steps:
+    - uses: actions/checkout@v6
+    - name: Set up JDK 25
+      uses: actions/setup-java@v5
+      with:
+        java-version: '25'
+        distribution: 'temurin'
+    - name: Setup Gradle
+      uses: gradle/actions/setup-gradle@v5
+    - name: Verify build is not broken
+      run: ./gradlew build