Use popover instead of layer

[kmcginnes]

Description

Replace use of UseLayer component with Popover.

• Remove UseLayer
• Change z index and width of existing Popover styles
• Update export options to set width
• Update ColorInput to use Popover
• Move color swatch out of adornment because adornment traps clicks and we want the swatch to be transparent to clicks

Validation

• Smoke test color input in node & edge styling

Related Issues

• Part of Remove react-laag #706
• Part of Migrate ColorInput to Radix & Tailwind #704
• Part of Remove useLayer() #703

Check List

• I confirm that my contribution is made under the terms of the Apache 2.0
  license.
• I have run pnpm checks to ensure code compiles and meets standards.
• I have run pnpm test to check if all tests are passing.
• I have covered new added functionality with unit tests if necessary.
• I have added an entry in the Changelog.md.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 36 lines in your changes missing coverage. Please review.

Project coverage is 18.62%. Comparing base (9d3a2b7) to head (2dc4b0b).
Report is 49 commits behind head on main.

Files with missing lines	Patch %	Lines
...-explorer/src/components/ColorInput/ColorInput.tsx	0.00%	34 Missing ⚠️
packages/graph-explorer/src/components/Popover.tsx	0.00%	1 Missing ⚠️
...r/controls/ExportControl/ExternalExportControl.tsx	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #707      +/-   ##
==========================================
+ Coverage   14.88%   18.62%   +3.73%     
==========================================
  Files         566      534      -32     
  Lines       25121    23128    -1993     
  Branches     1170     1151      -19     
==========================================
+ Hits         3739     4307     +568     
+ Misses      21050    18552    -2498     
+ Partials      332      269      -63     

Flag	Coverage Δ
unittests	18.62% <0.00%> (+3.73%)	⬆️

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