feat: FE: Import for Queries

[lyndsiWilliams]

SUMMARY

Addeed an import button for saved queries in the subMenu.

• Imported object is matched against existing objects based on uuid
• If there are conflicts in the file being imported, user is informed and can choose to overwrite or cancel the import
• Any other underlying sources that don’t yet exist should be created.
• User should be prompted for db credentials if needed
• Any underlying sources that exist and conflict shouldn’t be overwritten
• User sees a confirmation toast

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

BEFORE:

AFTER:

TEST PLAN

Testing has been implemented to ensure the existence of the new import button and modal.

ADDITIONAL INFORMATION

• Has associated issue: https://app.clubhouse.io/preset/story/214/fe-import-query
• 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

[lyndsiWilliams]

Continued at #14091