feat(vocab): add language and course dictionary endpoints and UI components

- Implemented `getLanguageDictionary` and `getCourseDictionary` methods in the VocabService to retrieve vocabulary entries filtered by search terms.
- Updated VocabController and vocabRouter to include new routes for accessing language and course dictionaries.
- Enhanced frontend components to navigate to the new dictionary views, including buttons in VocabCourseView and VocabLanguageView.
- Added localization entries for the dictionary feature in multiple languages, ensuring a consistent user experience across the platform.

backend/controllers/vocabController.js

@@ -18,6 +18,9 @@ class VocabController {
     this.createChapter = this._wrapWithUser((userId, req) => this.service.createChapter(userId, req.params.languageId, req.body), { successStatus: 201 });
     this.listLanguageVocabs = this._wrapWithUser((userId, req) => this.service.listLanguageVocabs(userId, req.params.languageId));
     this.searchVocabs = this._wrapWithUser((userId, req) => this.service.searchVocabs(userId, req.params.languageId, req.query));
+    this.getLanguageDictionary = this._wrapWithUser((userId, req) =>
+      this.service.getLanguageDictionary(userId, req.params.languageId, req.query)
+    );
 
     this.getChapter = this._wrapWithUser((userId, req) => this.service.getChapter(userId, req.params.chapterId));
     this.listChapterVocabs = this._wrapWithUser((userId, req) => this.service.listChapterVocabs(userId, req.params.chapterId));
@@ -31,6 +34,9 @@ class VocabController {
     this.getCompletedLessonVocabPool = this._wrapWithUser((userId, req) =>
       this.service.getCompletedLessonVocabPool(userId, req.params.courseId, req.query.untilLessonId)
     );
+    this.getCourseDictionary = this._wrapWithUser((userId, req) =>
+      this.service.getCourseDictionary(userId, req.params.courseId, req.query)
+    );
     this.getVocabDistractorPool = this._wrapWithUser((userId, req) =>
       this.service.getVocabDistractorPool(userId, req.params.courseId, req.query.beforeLessonId)
     );