RFID identification via OCPP

[efschu]

Is your feature request related to a problem? Please describe. RFID identification via OCPP

Describe the solution you'd like work as with other chargers

Describe alternatives you've considered the information it needs is already in evcc, and i made a script to work around meanwhile https://github.com/evcc-io/evcc/discussions/14559#discussioncomment-9883834

Additional context ocpp.go file tells me

// // Identify implements the api.Identifier interface
// Unless charger uses vehicle ID as idTag in authorize.req it is not possible to implement this in ocpp1.6
// func (c *OCPP) Identify() (string, error) {
// 	return "", errors.New("not implemented")
// }

but it should be workaroundable ;)