feat: multi language support (#254)

* 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 <best@classroomio.com>

apps/dashboard/src/lib/utils/services/courses/index.ts

@@ -158,7 +158,7 @@ export function fetchLesson(lessonId: Lesson['id']) {
   return supabase
     .from('lesson')
     .select(
-      `id, note, videos, slide_url, call_url, totalExercises:exercise(count), totalComments:lesson_comment(count), lesson_completion(id, profile_id, is_complete)`
+      `id, note, videos, slide_url, call_url, totalExercises:exercise(count), totalComments:lesson_comment(count), lesson_completion(id, profile_id, is_complete), lesson_language(id, content, locale)`
     )
     .eq('id', lessonId)
     .single();