[FEAT] 영어 번역

[hoosong0235]

Description

• assets/translations/en.json과 assets/translations/ko.json 채우기
• course.type, course.typeEn, lecture.commonTitle, lecture.commonTitleEn, professor.name, professornameEn 등 처리
• Text를 Text.tr()로 변경

완료된 페이지

• translate 1

  • home.dart
  • settings_page.dart
  • main_page.dart
  • user_page.dart
  • build_app_bar.dart
  • course_search_model.dart
  • lecture_search_model.dart
  • search_textfield.dart

• translate 2

  • privacy_page.dart
  • people_page.dart
  • course_detail_page.dart
  • lecture_detail_page.dart
  • review_block.dart
  • review_write_block.dart
  • review_page.dart
  • course_search_page.dart
  • lecture_search_page.dart
  • lecture_simple_block.dart
  • lecture_group_simple_block.dart

진행중인 페이지

• search_filter_panle.dart (unknown error)

진행 예정인 페이지

• timetable_page.dart (waiting for merge: feat@timetable)
• etc