* feat: multitranslational support
* - completion of settings page
- completion of sidebar
* sidebar rerendering bug fix
* completion of the lesson navigation & materials page
* completion of the course navigation
* completion of requested languages
* - Implementation of Language Picker
- Rename Bug Fixes
* checkpoint save
* - addition of the language picker to the onboarding.
- addition of the language switcher for the lesson notes.
* merge completion
* initialization of the new branch
* add transition.svelte file
* lesson note bug fix
* feat: add translation migration
* completion of translation
* fix height issue of dropdown
* refactoring
* fix: improve code with LOCALE from db
* finally get it fully functional
* connect with AI
* backward compatibility for lesson note
* preserve old content, when generating AI content
* undo translations in upgrade modal
* fix duplicate key issue from codacy trigger
---------
Co-authored-by: Rotimi Best <[email protected]>
