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/components/Org/LandingPage/PageHeader.svelte

@@ -1,5 +1,6 @@
 <script>
   import { Search } from 'carbon-components-svelte';
+  import { t } from '$lib/utils/functions/translations';
 
   let searchValue = '';
 </script>
@@ -9,13 +10,16 @@
     <!-- Course Description -->
     <div class="course-descr w-11/12 py-10">
       <h1 class="dark:text-white text-5xl text-white text-center my-4 font-bold">
-        Explore courses
+        {$t('course.navItem.landing_page.explore')}
       </h1>
       <p class="dark:text-white text-md text-white mb-6 text-center">
-        Find courses you will love from best teachers all over the world🌎.
+        {$t('course.navItem.landing_page.find')}🌎.
       </p>
 
-      <Search placeholder="Find a course..." bind:value={searchValue} />
+      <Search
+        placeholder={$t('course.navItem.landing_page.find_course')}
+        bind:value={searchValue}
+      />
     </div>
   </div>
 </section>