Filter exam clash

[TanLeYang]

Context

#1184 Additional filter option in module finder to hide modules with exams that clash with those of already selected modules

Implementation

Added an additional filter checkbox in the module finder sidebar under the "Exams" section to allow users to filter out modules whose exams clash with those they have already added to their timetable.

Implemented by connecting ModuleFinderSidebar to redux store using the useSelector hook and getting the active semester, modules already added to timetable and their semester data. From there, use the exam timings of the currently selected modules to generate FilterItem to be used by the ChecklistFilter.

Other Information

This is my first time opening a PR to an open source project, please let me know if there's anything I'm doing wrongly!! 🙏

[ZhangYiJiang]

Thanks for the PR! Could you run lint fix and resolve all of the lint issues so the build preview can run? https://app.circleci.com/pipelines/github/nusmodifications/nusmods/9966/workflows/e2e52d85-606b-4112-86ea-16477f18dd6a/jobs/68864

[codecov[bot]]

Codecov Report

Patch coverage has no change and project coverage change: -0.11% :warning:

Comparison is base (a88fef4) 53.09% compared to head (ec3d635) 52.99%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2845      +/-   ##
==========================================
- Coverage   53.09%   52.99%   -0.11%     
==========================================
  Files         271      271              
  Lines        5855     5867      +12     
  Branches     1397     1398       +1     
==========================================
  Hits         3109     3109              
- Misses       2746     2758      +12     

Files Changed	Coverage Δ
website/src/views/modules/ModuleFinderSidebar.tsx	0.00% <0.00%> (ø)

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[nusmods-deploy-bot[bot]]

Deployment preview for fcad1c1a ready at http://5fed1a2d1266047a2564bd0e--nusmods-deploy-preview.netlify.app

[TanLeYang]

Hi @ZhangYiJiang , I've fixed the lint issues!

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