Update deprecated keyboard event props

[chilled-capybara]

Fixes #696.

Typescript doesn't contain the defintions for event.key so these have been done as strings.
This could possibly be achieved by adding support in rc-util or using something like ts-key-enum.

I've updated the relevant commented-out code just to ensure the meaning isn't lost. Also, I've run prettier on the files I've worked on, the unrelated changes are in a dedicated commit.

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Name	Status	Preview	Comments	Updated (UTC)
picker	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Dec 12, 2023 10:41pm

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.94%. Comparing base (09b3ab1) to head (a2de18e).
⚠️ Report is 242 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #697   +/-   ##
=======================================
  Coverage   98.94%   98.94%           
=======================================
  Files          56       56           
  Lines        2458     2458           
  Branches      747      740    -7     
=======================================
  Hits         2432     2432           
  Misses         24       24           
  Partials        2        2           

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[afc163]

Conflicted