feat(SqlLab): improved database, schema, and table selection UI

[justinpark]

SUMMARY

As purposed in SIP-111, this commit introduces the new SQL Lab sidebar UI using tree view structure.

1. The database selector will be maintained, while the schema selector will be moved to a tree view.
2. Change the dropdown UI for the table selector to a tree view for improved navigation.
3. For databases that support catalogs, the catalog selector will be displayed under the database selector, and the tree will show the list of schemas for the corresponding category.
4. Add a search box to allow users to find matches in both the datasource catalog and table metadata and schema for enhanced information retrieval.
5. Caching and Action Buttons: As proposed, it will include a force-refresh feature and modify the existing functionalities from the previous table/schema to be displayed under the dropdown action link

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

sip-111--table-explore-tree.mov

TESTING INSTRUCTIONS

Go to SQL Lab and try to explore the table metadata using new UI

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

[korbit-ai]

Korbit doesn't automatically review large (500+ lines changed) pull requests such as this one. If you want me to review anyway, use /korbit-review.

[andy1xx8]

This UI is taking a lot of space vertically in the right panel