JSON Display improvements

[fiskus]

• Highlight clickable areas on hover
• Make empty space non-clickable: it's not obvious what should happen on click
• Move closing braces vertically aligned with opening braces

Clickable areas before:

Clickable areas after:

On hover:
https://github.com/quiltdata/quilt/assets/533229/83fda124-5cbc-4654-b941-14418e74f542

• Changelog entry (skip if change is not significant to end users, e.g. docs only)

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.

Project coverage is 37.71%. Comparing base (45070e6) to head (b6811d4).

Files with missing lines	Patch %	Lines
catalog/app/components/JsonDisplay/JsonDisplay.tsx	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3734      +/-   ##
==========================================
- Coverage   37.72%   37.71%   -0.01%     
==========================================
  Files         766      766              
  Lines       35148    35150       +2     
  Branches     5190     4997     -193     
==========================================
  Hits        13258    13258              
- Misses      21282    21284       +2     
  Partials      608      608              

Flag	Coverage Δ
api-python	91.00% <ø> (ø)
catalog	12.12% <0.00%> (-0.01%)	⬇️
lambda	87.95% <ø> (ø)

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[nl0]

lgtm, tho i feel like braces alignment became more confusing

[fiskus]

braces alignment became more confusing

Ok, I'm not sure about this, so I'll revert it