Add support for xtend_tuya

[azerty9971]

This PR adds support for Tuya IPC camera using xtend_tuya as a WHEP gateway.

Please don't hesitate to refactor anything that you feel is badly written, I'm not at all a GO developer but I tried my best to keep the code as clean as I could :).

If you want to test this yourself, don't hesitate to contact me at [email protected]

This should fix the issue #1345 and is related to issue #315 and PR #1379

Don't hesitate to make any comment.

Have a nice day, Azerty