refactor: tweak panel component

[adrianthedev]

Description

Prepare Avo::PanelComponent for public consumption.

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works

[codeclimate]

Code Climate has analyzed commit de559f1 and detected 0 issues on this pull request.

View more on Code Climate.

[codecov]

Codecov Report

Merging #1129 (de559f1) into main (90cc721) will increase coverage by 0.20%.
The diff coverage is 88.49%.

@@            Coverage Diff             @@
##             main    #1129      +/-   ##
==========================================
+ Coverage   94.08%   94.29%   +0.20%     
==========================================
  Files         430      543     +113     
  Lines        7861    10778    +2917     
==========================================
+ Hits         7396    10163    +2767     
- Misses        465      615     +150     

Impacted Files	Coverage Δ
.../avo/fields/common/single_file_viewer_component.rb	40.90% <0.00%> (ø)
app/controllers/avo/private_controller.rb	80.00% <0.00%> (-20.00%)	⬇️
lib/avo/configuration.rb	54.16% <44.44%> (-36.26%)	⬇️
app/controllers/avo/debug_controller.rb	46.15% <46.15%> (ø)
app/controllers/avo/actions_controller.rb	71.73% <57.14%> (-3.27%)	⬇️
lib/avo/app.rb	75.25% <60.78%> (-15.66%)	⬇️
app/components/avo/sidebar_component.rb	75.00% <66.66%> (-25.00%)	⬇️
lib/avo/base_action.rb	80.39% <66.66%> (-1.06%)	⬇️
app/controllers/avo/home_controller.rb	64.28% <75.00%> (+0.64%)	⬆️
lib/avo/concerns/has_editable_controls.rb	75.00% <75.00%> (ø)
... and 302 more

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[github-actions]

This PR has been merged into main. The functionality will be available in the next release.

Please check the release guide for more information.