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

Merging #3734 (b471445) into master (e10ecb4) will increase coverage by 54.34%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           master    #3734       +/-   ##
===========================================
+ Coverage   34.82%   89.16%   +54.34%     
===========================================
  Files         709       79      -630     
  Lines       31105     9942    -21163     
  Branches     4638        0     -4638     
===========================================
- Hits        10831     8865     -1966     
+ Misses      19125     1077    -18048     
+ Partials     1149        0     -1149     

Flag	Coverage Δ
api-python	91.23% <ø> (-0.13%)	⬇️
catalog	?
lambda	86.26% <ø> (ø)

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see 633 files with indirect coverage changes

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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