Feature/ci setup; Format the code automatically by CI

.github/workflows/code_style.yml

@@ -5,16 +5,43 @@ on:
       - main
       - feature/ci_setup
   pull_request:
+    paths:
+      - '.github/workflows/code_style.yml'
+      - '**/*.kt'
+      - '**/*.kts'
 
 jobs:
   check-code-style:
     runs-on: ubuntu-latest
+    env:
+      BRANCH_REF: ${{ github.event_name == 'push' && github.ref || github.event.pull_request.head.ref }}
     steps:
       - uses: actions/checkout@v3
       - uses: actions/setup-java@v3
         with:
           distribution: 'corretto'
           java-version: '17'
+
+      - name: Format code style
+        run: |
+          ./gradlew ktlintFormat
+
+      - name: Commit files changed by ktlintFormat
+        run: |
+          git config --global user.email "actions@github.com"
+          git config --global user.name "GitHub Actions"
+          git add .
+          git diff --quiet && git diff --staged --quiet || git commit -m "Apply ktlint formatting"
+
       - name: Check code style
         shell: bash
-        run: ./gradlew ktlintCheck
+        run: ./gradlew ktlintCheck
+
+      - name: Pull latest changes
+        run: git pull --rebase origin ${BRANCH_REF}
+
+      - name: Push changes
+        uses: ad-m/github-push-action@master
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          branch: ${{ github.event_name == 'push' && github.ref || github.event.pull_request.head.ref }}

README.md

@@ -423,6 +423,8 @@ To add to a multiplatform project, add the dependency to the common source-set:
 ```kotlin
 repositories {
     mavenCentral()
+    // Desktop target has to add this repo
+    maven("https://jogamp.org/deployment/maven")
 }
 
 kotlin {