Tesla: require personal developer account

[andig]

Fix #17981

TODO

• validate token refresh @naltatis
• migrate commands
• test commands @naltatis
• remove build secret
• update template docs
• proper communication (release notes / blog post / how to)

See #17501

Breaking Change

See new configuration instructions:

Tesla offers an official, but paid vehicle API. For private use, you can create a Tesla Developer Account and receive a monthly API credit of $10. This is usually sufficient for the common evcc use cases.

The myteslamate.com guide explains the process and generates a free Access and Refresh Token. With this token pair and your Client ID created in the Tesla Developer Account, evcc can directly communicate with the Tesla API. You can see your used credit at Tesla.

To use a Tesla Wall Connector, you need a public Command Proxy Server. myteslamate.com provides this service for 12€/year. Configure the Command permissions at myteslamate.com and enter the Proxy Token here. Start, stopp and current commands are sent to Tesla via this proxy.

[andig]

/cc @GrimmiMeloni die PW funktioniert immer noch mit dem alten API?

[GrimmiMeloni]

/cc @GrimmiMeloni die PW funktioniert immer noch mit dem alten API?

Ja. Ein evcc meter -b hold funktioniert auch weiterhin.