feat: add --listen-during-wake-sound argument (#273)

* feat: add --listen-during-wake-sound argument

---------

Co-authored-by: Florian Asche <github@florian-asche.de>

.env.example

@@ -60,6 +60,10 @@ LVA_PULSE_COOKIE="/run/user/${LVA_USER_ID}/pulse/cookie"
 ### Enable thinking sound (optional):
 # ENABLE_THINKING_SOUND="1"
 
+### Start listening during wake sound (optional):
+# Start listening immediately after wake word detection, without waiting for the wake sound to finish
+# LISTEN_DURING_WAKE_SOUND="1"
+
 ### Wake word directory (optional):
 # path for custom files in docker is for example "app/wakewords/custom"
 # WAKE_WORD_DIR="app/wakewords"