ci: Add workflow to sync Crowdin translations (#2953)

Author: Ushie

.github/workflows/sync_crowdin.yml

@@ -0,0 +1,39 @@
+name: Sync Crowdin
+
+on:
+  workflow_dispatch:
+  schedule: 
+    - cron: 0 * 1 * *
+  push:
+    paths:
+      - /src/main/resources/addresources/values/strings.xml
+
+jobs:
+  sync:
+    name: Sync translations
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Sync translations
+        uses: crowdin/github-action@v1
+        with:
+          config: crowdin.yml
+          upload_sources: true
+          upload_translations: false
+          download_translations: true
+          localization_branch_name: feat/translations
+          create_pull_request: true
+          pull_request_title: "chore: Sync translations"
+          pull_request_body: "Sync translations from [crowdin.com/project/revanced](https://crowdin.com/project/revanced)"
+          pull_request_base_branch_name: "dev"
+          commit_message: "chore: Sync translations"
+          github_user_name: revanced-bot
+          github_user_email: [email protected]
+        env:
+          GITHUB_TOKEN: ${{ secrets.REPOSITORY_PUSH_ACCESS }}
+          CROWDIN_PROJECT_ID: ${{ secrets.CROWDIN_PROJECT_ID }}
+          CROWDIN_PERSONAL_TOKEN: ${{ secrets.CROWDIN_PERSONAL_TOKEN }}

crowdin.yml

@@ -0,0 +1,8 @@
+project_id_env: "CROWDIN_PROJECT_ID"
+api_token_env: "CROWDIN_PERSONAL_TOKEN"
+
+preserve_hierarchy: false
+files:
+    - source: src/main/resources/addresources/values/strings.xml
+      translation: src/main/resources/addresources/values-%android_code%/strings.xml
+      skip_untranslated_strings: true