feat: add progress tracking for course completion metrics

- Introduced a new module for progress tracking in the LMS service.
- Implemented `calculate_course_completion` function to compute total lessons, completed lessons, and progress percentage for a user in a specific course.
- Updated the main.rs file to include the new progress tracking module.
- Enhanced the Excel import functionality in the Question Bank to support various question types and improved error handling.
- Added a new dependency on the `xlsx` library for handling Excel files in the frontend.
- Modified the course settings page to include a branded certificate template with additional organization details.
- Updated the package.json and package-lock.json files to include the new `xlsx` dependency.
- Changed the default state for ingestRag in the Admin Shared Materials page to true.

web/studio/package.json

@@ -23,7 +23,8 @@
     "react": "^18",
     "react-dom": "^18",
     "react-markdown": "^10.1.0",
-    "tailwind-merge": "^2.3.0"
+    "tailwind-merge": "^2.3.0",
+    "xlsx": "^0.18.5"
   },
   "devDependencies": {
     "@types/node": "^20",