Fix: Suppress spurious end-file event when starting playback and tts.speak (#179)

* bugfix: supress first end of file event and only callback on second one
* add some notes on testing
* fixed tts.speak
* fix unduck after timer end
* use custom docker-entrypoint on dev container
* change mv to copy in the docs when using .env file

linux_voice_assistant/mpv_player.py

@@ -105,6 +105,12 @@ class MpvMediaPlayer:
             finally:
                 self._done_callback = None
 
+    @property
+    def is_playing(self) -> bool:
+        """Check if the player is currently playing or paused."""
+        state = self._player.state()
+        return state in (PlayerState.PLAYING, PlayerState.PAUSED, PlayerState.LOADING)
+
     def set_volume(self, volume: float) -> None:
         """
         Set playback volume.