feat: Adds the Featured Charts dashboard

[michael-s-molina]

SUMMARY

Creates a new example dashboard called Featured Charts with the objective of demonstrating our most active supported charts. Another objective is to provide a dashboard where we can test our plugin features using these chart types.

This PR also changes the viz gallery to include missing featured charts and sort the charts alphabetically to help users find the charts they are looking for. Another small tweak was to add some margin to the Create New Chart button.

TESTING INSTRUCTIONS

Check the Featured Charts dashboard and the viz gallery changes.

ADDITIONAL INFORMATION

• Has associated issue:
• Required feature flags:
• Changes UI
• Includes DB Migration (follow approval process in SIP-59)
  • Migration is atomic, supports rollback & is backwards-compatible
  • Confirm DB migration upgrade and downgrade tested
  • Runtime estimates and downtime expectations provided
• Introduces new feature or API
• Removes existing feature or API

[michael-s-molina]

@rusackas @yousoph @kasiazjc @kgabryje Please review the viz gallery changes. Specifically, if you agree to sort the charts alphabetically.

@kasiazjc While working on the viz gallery I also noticed an inconsistent spacing between charts depending on their name. I opened #28788 to discuss it and once we have a solution, we can create a follow-up PR to fix it.

FYI: We need #28652 for the Histogram chart. Right now it will render with an error.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 70.25%. Comparing base (76d897e) to head (a98ab9f).
Report is 1094 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #28789      +/-   ##
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+ Coverage   60.48%   70.25%   +9.76%     
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  Files        1931     1952      +21     
  Lines       76236    77593    +1357     
  Branches     8568     8756     +188     
==========================================
+ Hits        46114    54514    +8400     
+ Misses      28017    20948    -7069     
- Partials     2105     2131      +26     

Flag	Coverage Δ
hive	48.94% <ø> (-0.23%)	⬇️
javascript	57.78% <100.00%> (+0.07%)	⬆️
mysql	77.15% <ø> (?)
postgres	77.29% <ø> (?)
presto	53.53% <ø> (-0.27%)	⬇️
python	83.61% <ø> (+20.12%)	⬆️
sqlite	76.73% <ø> (?)
unit	59.01% <ø> (+1.38%)	⬆️

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[john-bodley]

@michael-s-molina I love the color palette. Have you considered updating the viz gallery thumbnails with your examples so it feels more coherent/consistent—upleveling the visual quality?

[michael-s-molina]

@michael-s-molina I love the color palette. Have you considered updating the viz gallery thumbnails with your examples so it feels more coherent/consistent—upleveling the visual quality?

That's a great suggestion! What do you think @kasiazjc @rusackas?

[michael-s-molina]

@michael-s-molina I love the color palette. Have you considered updating the viz gallery thumbnails with your examples so it feels more coherent/consistent—upleveling the visual quality?

@john-bodley I opened #29076 to register your suggestion and added a topic for the next Town Hall.

[rusackas]

LGTM!