Add menu button to add module from planner to timetable

[leslieyip02]

Context

Resolves #3726

Implementation

• Add an additional option to the module menu dropdown to add the module to the timetable

https://github.com/nusmodifications/nusmods/assets/90888680/3bdb35b6-8614-45dd-aa7f-dcf95a44f652

Other Information

• Would it be better if there was a single button to add all modules into the timetable/override the current timetable with the planner mods?

[vercel[bot]]

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[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 5 lines in your changes are missing coverage. Please review.

Project coverage is 53.53%. Comparing base (ae6e97d) to head (45a149f).

Files	Patch %	Lines
website/src/views/planner/PlannerModule.tsx	0.00%	3 Missing :warning:
...iews/planner/PlannerContainer/PlannerContainer.tsx	0.00%	2 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #3729 +/- ## ========================================== - Coverage 53.58% 53.53% -0.05% ========================================== Files 272 272 Lines 5987 5992 +5 Branches 1434 1435 +1 ========================================== Hits 3208 3208 - Misses 2779 2784 +5 ```

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