Fixes#531. When automaticallyAuth is configured and a relay closes the
connection between sending the AUTH challenge and the client sending
the signed response, the SendingOnClosedConnection error was propagating
as an unhandled promise rejection.
This is a race condition that commonly occurs with relays that enforce
WoT or whitelists - they accept the WebSocket, send an AUTH challenge,
but close the connection before the client can respond.
The fix catches the SendingOnClosedConnection error specifically in the
AUTH case handler, preventing unhandled rejections while still propagating
other errors.
Adds a skipSwitchRelays option that prevents automatic switchRelays()
call in fromURI. This is useful when users want to call switchRelays
manually at their own pace, avoiding race conditions when making
immediate RPC calls after connection.
Fixes#526
Kaiandfiatjaf_