feat(utils): add useFeatureFlags hook

[natemoo-re]

Proposal for a new useFeatureFlags hook, hopefully to replace the <Feature> component and many uses of organization.features.includes().

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 26 lines in your changes missing coverage. Please review.

✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
static/app/utils/useFeatureFlags.tsx	0.00%	26 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #80069      +/-   ##
==========================================
- Coverage   78.10%   73.22%   -4.88%     
==========================================
  Files        7157     7158       +1     
  Lines      316588   316614      +26     
  Branches    43646    43650       +4     
==========================================
- Hits       247271   231854   -15417     
- Misses      62972    78279   +15307     
- Partials     6345     6481     +136     

[getsantry]

This pull request has gone three weeks without activity. In another week, I will close it.

But! If you comment or otherwise update it, I will reset the clock, and if you add the label WIP, I will leave it alone unless WIP is removed ... forever!

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"A weed is but an unloved flower." ― Ella Wheeler Wilcox 🥀