feat: Re-claim delegations during client setup (#644)

The rest of storacha/project-tracking#125.
This along with [generating the space delegations on the fly during
`access/claim`](storacha/w3up#1555) will make
new spaces appear on the page without logging out.

---

If the client is restored from local storage, it may be out of date.
This fetches the latest delegations from the server and updates the
client. This makes loading the client from local storage a
stale-while-revalidate operation.

packages/react/src/hooks.ts

@@ -31,6 +31,7 @@ export function useDatamodel ({ servicePrincipal, connection }: DatamodelProps):
       setEvents(events)
       setAccounts(Object.values(client.accounts()))
       setSpaces(client.spaces())
+      await client.capability.access.claim()
     },
     [servicePrincipal, connection]
   )