ci: Add crowdin github actions

.github/workflows/download_translations.yml

@@ -0,0 +1,33 @@
+name: Download translations from Crowdin
+
+on:
+  schedule:
+    - cron: '0 21 * * *'
+
+jobs:
+  crowdin:
+    runs-on: ubuntu-latest
+    strategy:
+      max-parallel: 1
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Crowdin push
+        uses: crowdin/github-action@v1
+        with:
+          config: 'crowdin.yml'
+          upload_sources: false
+          upload_translations: false
+          download_translations: true
+          localization_branch_name: l10n_crowdin_translations
+
+          create_pull_request: true
+          pull_request_title: 'chore: Update translations'
+          pull_request_body: 'New Crowdin pull request with translations'
+          pull_request_labels: 'localization'
+          pull_request_base_branch_name: 'master'
+          commit_message: 'chore: Update translations from Crowdin'
+        env:
+          CROWDIN_PERSONAL_TOKEN: ${{ secrets.CROWDIN_PERSONAL_TOKEN }}
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/upload_texts.yml

@@ -0,0 +1,24 @@
+name: Upload source texts to Crowdin
+
+on:
+  push:
+    branches: [ master ]
+
+jobs:
+  crowdin:
+    runs-on: ubuntu-latest
+    strategy:
+      max-parallel: 1 # Should be 1 to avoid parallel builds
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Crowdin push
+        uses: crowdin/github-action@v1
+        with:
+          config: 'crowdin.yml'
+          upload_sources: true
+          upload_translations: false
+          download_translations: false
+        env:
+          CROWDIN_PERSONAL_TOKEN: ${{ secrets.CROWDIN_PERSONAL_TOKEN }}

crowdin.yml

@@ -1,17 +1,10 @@
 # To use the crowdin-cli, set an access token in CROWDIN_PERSONAL_TOKEN or a ~/.crowdin.yml
 # File structure documentation can be found at: https://developer.crowdin.com/configuration-file/
 
+"api_token_env": "CROWDIN_PERSONAL_TOKEN"
 "project_id": 582621 # This is https://crowdin.com/project/ruffle
 "preserve_hierarchy": true # Keep the directory structure so that we know, for example, "messages.json" belongs to the extension
 
-# Github integration
-"pull_request_title": "Update text translations"
-"pull_request_labels": [
-  "localization"
-]
-"commit_message": "chore: Updates translations in %original_file_name% from Crowdin"
-"append_commit_message": false
-
 # Files we want to translate
 "files": [
   {