Add delay to continue conversation before listening (#342)

Add a configurable amount of delay (defaulting to 0.5s) after the TTS playback is finished to avoid the mic to capture the end of response during start/continue conversation.

Fixes #313

.env.example

@@ -76,6 +76,9 @@ LVA_PULSE_COOKIE="/run/user/${LVA_USER_ID}/pulse/cookie"
 ### Refactory seconds (optional):
 # REFACTORY_SECONDS="2"
 
+### Delay before mic opens for continued conversation (optional):
+# CONTINUE_CONVERSATION_DELAY="0.5"
+
 ### Sound files (optional):
 # path for custom files in docker is for example "sounds/custom/your_soundfile.flac"
 # WAKEUP_SOUND="sounds/wake_word_triggered.flac"