Keep session persistance by default, such that when reloading a dapp,
the wizardconnect session is kept alive.
Improve signature request interface. Simplify the react API.
The useWizardConnect hook now saves PathXpub[] from wallet_ready into
the localStorage session. On auto-reconnect, restoreSessionPaths() is
called so getPubkey() works immediately without waiting for the wallet.
Corrupt cached paths are cleared with a warning.
