Migrate redux reducer about dictionary

[jooyeongmee]

변경 사항:

• reducers/dictionary 폴더 하위 파일들 js -> ts 로 변경

진행 상황:

• 코드 수정
• 테스트

특이 사항:

• 코드 수정 중 CourseLastSearchOption 타입이 optional 처리가 빠진 것 같아 추가하였습니다.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 44 lines in your changes are missing coverage. Please review.

Project coverage is 4.50%. Comparing base (c729e98) to head (74eca5b).

❗ Current head 74eca5b differs from pull request most recent head 8121398. Consider uploading reports for the commit 8121398 to get more accurate results

Files	Patch %	Lines
src/reducers/dictionary/list.ts	0.00%	17 Missing and 1 partial ⚠️
src/reducers/dictionary/search.ts	0.00%	14 Missing and 1 partial ⚠️
src/reducers/dictionary/courseFocus.ts	0.00%	9 Missing and 2 partials ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##           migration     #64      +/-   ##
============================================
- Coverage       4.51%   4.50%   -0.01%     
============================================
  Files            210     210              
  Lines           6495    6501       +6     
  Branches        1743    1748       +5     
============================================
  Hits             293     293              
- Misses          6026    6036      +10     
+ Partials         176     172       -4     

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[yumincho]

👍

[sboh1214]