Vault view and management in the web UI

Use case or problem

While setting up additional vaults for the first time, I found it hard to understand what is already defined locally and what is already synced within my Obsidian account.

Proposed solution

Extend the “Sync” view in the web UI (or add a new one “Vaults”) to show your vaults, how much space is in use, sync status, etc.

Current workaround (optional)

None

Related feature requests (optional)