feat(sidebar): show schemas as collapsible sections in the Tables sidebar

[luizvergennes]

solves #1296

Adds a Sidebar group in the settings, with a "Display schemas on the sidebar" option:

Enabling this option, shows all schemas on the sidebar, and they can be expanded:

✨ Used AI to help me create this PR.

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[luizvergennes]

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[luizvergennes]

I do feel it could still be expanded a bit, to allow the tabs to also work across, schemas. I did not test, on my build. But on the production app, the tabs close as soon as I switch to another schema.