Feature Request: Add J2534 support

Thanks for this great library which is working great.
I'm asking to add J2534 device support since all of the libraries on github for J2534 are not working (tried all of them) since you are supporting a lot of interfaces in this library why not adding J2534 devices to the list it would be great
Thanks.

該 issue 未指定檔案、測試或進入點。首先定義 J2534 裝置和 API 的範圍，然後確認 python-can 目前如何表示受支援的介面；完成標準尚未指定，必須在實作前達成共識。

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