Initial Sendspin support

[lowlyocean]

Closes #6

[omaramin-2000]

Good, but why do you think of setting a fixed volume 60 for the TTS player, and changing the ducking volume to 30 as well?

[omaramin-2000]

FYI, there are set of changes we're working on for the media player to improve its updating state, and try separating satellite announcements from it so, it doesn't affect any playing music #43

[lowlyocean]

Good, but why do you think of setting a fixed volume 60 for the TTS player, and changing the ducking volume to 30 as well?

Even though music was successfully being set to "unduck" and "duck" volume, the wake word chime, TTS, announcements, and timer were all playing at 100 volume when using the sendspin source. This is too high for my setup, I can't adjust the device volume because it is being shared with other applications on the same host besides LVA. There is still unexpected behavior I haven't solved yet where that the TTS/Announcements/Chime/Timer will play at "duck" volume IF the source of the music is the existing MPV stream from home assistant (rather than the new Sendspin PCM stream). Maybe it is not actually playing at ducked volume, but it is some bug with in translation between "perceptive" volume scale of Senspin and "linear" volume scale of existing LVA code.

I think this table needs to be documented because the behavior is unintuitive (I only fill in the values from memory)

	Music source = Sendspin (PCM stream)					Music source = Home Assistant (MPV stream)
	Music Volume	TTS Volume	Wake Word Chime Volume	Announcement Volume	Timer Volume	Music Volume	TTS Volume	Wake Word Chime Volume	Announcement Volume	Timer Volume
Unducked state	“unducked” volume	60	60	60	60	“ducked” volume?	“ducked” volume?	“ducked” volume?	“ducked” volume?	“ducked” volume?
Ducked State	“ducked” volume	30	30	30	30	“ducked” volume?	“ducked” volume?	“ducked” volume?	“ducked” volume?	“ducked” volume?
Initial State	?	?	?	?	?	?	?	?	?	?
“Mute” state	?	?	?	?	?	?	?	?	?	?

[lowlyocean]

One of the recent commits that merge 'main' into sendspin branch seems to be causing the error below:

Traceback (most recent call last):
  File "<frozen runpy>", line 198, in _run_module_as_main
  File "<frozen runpy>", line 88, in _run_code
  File "/srv/linux_voice_assistant/__main__.py", line 432, in <module>
    asyncio.run(main())
    ~~~~~~~~~~~^^^^^^^^
  File "/usr/local/lib/python3.13/asyncio/runners.py", line 195, in run
    return runner.run(main)
           ~~~~~~~~~~^^^^^^
  File "/usr/local/lib/python3.13/asyncio/runners.py", line 118, in run
    return self._loop.run_until_complete(task)
           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^
  File "/usr/local/lib/python3.13/asyncio/base_events.py", line 725, in run_until_complete
    return future.result()
           ~~~~~~~~~~~~~^^
  File "/srv/linux_voice_assistant/__main__.py", line 281, in main
    vsp = VoiceSatelliteProtocol(state)
  File "/srv/linux_voice_assistant/satellite.py", line 123, in __init__
    self.state.tts_player.player.volume = 60
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'MpvMediaPlayer' object has no attribute 'player'. Did you mean: 'play'?

[omaramin-2000]

For my test, I am not seeing LVA showing up as a SendSpin player in Music Assistant.