feat(vocab): implement user vocab lesson progress reset functionality

- Added `resetUserVocabLessonProgress` method in `AdminController` to allow admins to reset a user's progress for a specific vocab lesson.
- Introduced corresponding route in `adminRouter` for the new reset functionality.
- Enhanced `VocabService` with methods to purge lesson progress for users, ensuring that only the specified lesson's progress is affected.
- Updated UI components in `UsersView` to facilitate the selection of courses and lessons for resetting progress, including confirmation dialogs and loading states.
- Added localization support for the new reset functionality across multiple languages.
- Implemented reset functionality in `VocabLessonView` for users to reset their own lesson progress.

backend/controllers/vocabController.js

@@ -52,6 +52,7 @@ class VocabController {
     // Progress
     this.getCourseProgress = this._wrapWithUser((userId, req) => this.service.getCourseProgress(userId, req.params.courseId));
     this.updateLessonProgress = this._wrapWithUser((userId, req) => this.service.updateLessonProgress(userId, req.params.lessonId, req.body));
+    this.resetLessonProgress = this._wrapWithUser((userId, req) => this.service.resetMyLessonProgress(userId, req.params.lessonId));
     
     // Grammar Exercises
     this.getExerciseTypes = this._wrapWithUser((userId) => this.service.getExerciseTypes());