New Feature: Plex AppleTV Support

[Animizio]

Describe the bug
A clear and concise description of what the bug is.

To Reproduce
Steps to reproduce the behavior:

1. Go to Devices Configuration - Entity
2. Click on '....'
3. Scroll down to choose Entity
4. See error: No AppleTV Media Player is visible

Expected behavior
Visible AppleTV Plex media_player.
Its also already added and visible in homeassistant through the plex integration.

Checks
[] I am running Home Assistant on HTTP protocol
[ X] I am running BOTH Home Assistant AND Plex on HTTPS protocol
[X ] My Plex server is accessible through protocol, port and ip/hostname I have specified for the card.
[X ] My Plex server is running on HTTPS and has a valid certificate.

Card Configuration
not needed

Card Version
latest (just installed)

Plex Version
latest (beta)

Device information
Firefox / PC
Trying to integrate an AppleTV MediaPlayer