Add crowdin support

Based on Lawnchair's `crowdin.yml` file

.github/workflows/crowdin.yml

@@ -0,0 +1,33 @@
+name: Crowdin Synchronization
+
+on:
+  workflow_dispatch:
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+
+  synchronize-with-crowdin:
+    name: Synchronize with Crowdin
+    if: github.repository_owner == 'LawnchairLauncher'
+    runs-on: ubuntu-latest
+    steps:
+
+    - name: Checkout
+      uses: actions/checkout@v4
+
+    - name: Sync Translations
+      uses: crowdin/github-action@v2
+      with:
+        upload_translations: false
+        upload_sources: true
+        download_translations: true
+        localization_branch_name: i18n
+        create_pull_request: true
+        base_url: 'https://lawnchair.crowdin.com'
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        CROWDIN_PROJECT_ID: ${{ secrets.CROWDIN_PROJECT_ID }}
+        CROWDIN_PERSONAL_TOKEN: ${{ secrets.CROWDIN_PERSONAL_TOKEN }}