Modify pytapo to enable rtsp restream for HA independent software

[apkuki]

Modify pytapo library so that it can enable/open a rtsp restream for the battery operated Tapo cameras to be used independent from HA in Frigate or any other NVR.

Yes with a slight modification in pytapo library a rtsp restream can be opened.

Please open PR there.

Originally posted by @JurajNyiri in #507

[JurajNyiri]

The change will need to be done here https://github.com/JurajNyiri/pytapo/blob/main/pytapo/media_stream/streamer.py#L26 to add rtsp mode, and then simply here https://github.com/JurajNyiri/pytapo/blob/main/pytapo/media_stream/streamer.py#L130 to output it.

PRs are welcomed as well.