feat(workflows): add workflow to build project and gen jar

.github/workflows/main.yml

@@ -0,0 +1,45 @@
+name: Build Java Project and Generate JAR
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      # Step 1: Checkout the latest code
+      - name: Checkout repository
+        uses: actions/checkout@v4  # Updated to the latest version
+
+      # Step 2: Set up Java environment with required distribution
+      - name: Set up JDK 22
+        uses: actions/setup-java@v4  # Updated to the latest version
+        with:
+          java-version: '22'
+          distribution: 'temurin'
+
+      # Step 3: Cache Gradle dependencies
+      - name: Cache Gradle dependencies
+        uses: actions/cache@v3
+        with:
+          path: ~/.gradle/caches
+          key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle*', '**/gradle-wrapper.properties') }}
+          restore-keys: |
+            ${{ runner.os }}-gradle
+
+      # Step 4: Build the project with Gradle and generate the JAR
+      - name: Build with Gradle
+        run: ./gradlew build -x test
+
+      # Step 5: Upload the generated JAR as an artifact
+      - name: Upload JAR file
+        uses: actions/upload-artifact@v3
+        with:
+          name: SpellingTrainer
+          path: build/libs/*.jar