FI-2433: Collapse request details

[AlyssaWang]

Summary

Allows full JSON responses (and request bodies) to collapse and be copied into the clipboard.

Testing Guidance

Try it, make sure it works, let me know if anything is weird.

[codecov]

Codecov Report

Attention: Patch coverage is 85.41667% with 21 lines in your changes are missing coverage. Please review.

Project coverage is 77.68%. Comparing base (022aeaf) to head (42ce615).

Files	Patch %	Lines
client/src/components/_common/CopyButton.tsx	75.47%	7 Missing and 6 partials ⚠️
client/src/components/_common/CollapseButton.tsx	86.84%	0 Missing and 5 partials ⚠️
...nt/src/components/RequestDetailModal/CodeBlock.tsx	93.93%	0 Missing and 2 partials ⚠️
...mponents/RequestDetailModal/RequestDetailModal.tsx	93.33%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #448      +/-   ##
==========================================
+ Coverage   77.54%   77.68%   +0.14%     
==========================================
  Files         228      230       +2     
  Lines       11443    11510      +67     
  Branches     1076     1083       +7     
==========================================
+ Hits         8873     8942      +69     
+ Misses       1944     1936       -8     
- Partials      626      632       +6     

Flag	Coverage Δ
backend	93.89% <ø> (ø)
frontend	70.92% <85.41%> (+0.26%)	⬆️

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