[Feature] Catalog Explorer Panel in Extension

[Rooth123]

Describe the feature
Adding a Catalog Explorer Panel in the extension would go far in aiding development. It could list schemas, tables and fields so we are not required to open up the Web UI when we need to check a schema.

It could maybe even have similar behaviour to the web UI:

• Insert table/column/schema name into code button
• Copy path to clipboard
• Open schema/table externally in catalog explorer in web browser.
• Details panel showing metadata e.g. owner, last updated etc.