Add volume arg to parser (#335)

This PR adds the mic volume to the arg parser and makes the value range from 1-100

linux_voice_assistant/__main__.py

@@ -71,6 +71,7 @@ async def main() -> None:
         action="store_true",
         help="List audio output devices and exit",
     )
+    parser.add_argument("--mic-volume", type=int, default=100, choices=list(range(1, 101)), help="Microphone volume level (1 to 100)")
     parser.add_argument("--mic-auto-gain", type=int, default=0, choices=list(range(32)))
     parser.add_argument("--mic-noise-suppression", type=int, default=0, choices=(0, 1, 2, 3, 4))
     parser.add_argument(
@@ -282,6 +283,8 @@ async def main() -> None:
             _LOGGER.exception("Extras for webrtc are not installed")
             sys.exit(1)
 
+    if args.mic_volume > 0.0:
+        preferences.mic_volume = args.mic_volume
     if args.mic_auto_gain > 0:
         preferences.mic_auto_gain = args.mic_auto_gain