Add CI (#6)

* Add CI

* Fix Working Directory

Working directory was still Robot2024 (copy-paste error)

* Fix second copy-paste error

.github/workflows/gradle.yml

@@ -0,0 +1,34 @@
+name: Build Gradle project
+
+on: push
+
+permissions:
+      contents: read
+
+jobs:
+  build-gradle-project:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout project sources
+      uses: actions/checkout@v4
+      with:
+        submodules: 'recursive'
+    - name: Set up JDK 17
+      uses: actions/setup-java@v3
+      with:
+        java-version: '17'
+        distribution: 'temurin'
+        cache: gradle
+    - name: Setup Gradle
+      uses: gradle/gradle-build-action@v2
+    - name: Ensure LF
+      working-directory: SharpShooter
+      run: |
+        set -o xtrace
+        tr -d '\015' < "gradlew">"gradlew.temp"
+        rm -f "gradlew"
+        mv "gradlew.temp" "gradlew"
+        chmod +x "gradlew"
+    - name: Run build with Gradle Wrapper
+      working-directory: SharpShooter
+      run: ./gradlew build