Joshen Lim 2d1a2ff9a2 Set up feature preview for explorer (#49602) ...

## Context

Sets up the Explorer behind the feature preview modal + removes the
temporary entry point from the SQL Editor
Changes are still not live on production, so will only affect local +
staging.

Enabling the feature preview will replace the sidebar nav for SQL Editor
to new Explorer (Icon remains unchanged, just the label)

<img width="918" height="647" alt="image"
src="https://github.com/user-attachments/assets/b088eb47-1176-4618-b345-d1ec0521b092"
/>


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

- **New Features**
- Added an “Explorer & Notebooks” feature preview with an overview image
and direct access to Explorer or SQL Editor.
  - Added Explorer navigation when the preview is enabled.

- **Improvements**
- Updated desktop and mobile navigation to consistently display the
available editor destination.
- Improved the Explorer shortcut tooltip to clearly say “Go to
Explorer.”
  - Organized SQL Editor previews under the Editors category.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

2026-08-26 22:45:11 +08:00

..

MobileMenuContent

Set up feature preview for explorer (#49602)

2026-08-26 22:45:11 +08:00