feat: Add xblock-adventure to the translation pipeline

This PR needs openedx-unsupported/xblock-adventure#54 before it's merged.

Refs: FC-0012 OEP-58

.github/workflows/extract-translation-source-files.yml

@@ -43,6 +43,7 @@ jobs:
           - credentials
           - DoneXBlock
           - RecommenderXBlock
+          - xblock-adventure
           - xblock-drag-and-drop-v2
           - xblock-lti-consumer
           - xblock-qualtrics-survey

transifex.yml

@@ -194,6 +194,14 @@ git:
     source_file: translations/studio-frontend/src/i18n/transifex_input.json
     translation_files_expression: 'translations/studio-frontend/src/i18n/messages/<lang>.json'
 
+  # xblock-adventure
+  - filter_type: dir
+    file_format: PO
+    source_file_extension: po
+    source_language: en
+    source_file_dir: translations/xblock-adventure/adventure/conf/locale/en/
+    translation_files_expression: 'translations/xblock-adventure/adventure/conf/locale/<lang>/'
+
   # xblock-drag-and-drop-v2
   - filter_type: dir
     file_format: PO