Refactor wake phrase handling: introduce REQUIRE_WAKE_WORD configuration, update documentation, and adjust assistant behavior for improved user experience.

bolt_assistant/__main__.py

@@ -1,4 +1,5 @@
-"""Bolt Assistant: say "Hey Bolt", ask, hear the answer.
+"""Bolt Assistant: talk while the mic is open, hear the answer. (Setting
+REQUIRE_WAKE_WORD=true puts "Hey Bolt" back in front of each request.)
 
     python -m bolt_assistant                 listen on the default mic
     python -m bolt_assistant --verbose       also show what was heard but ignored
@@ -89,7 +90,8 @@ def main(argv=None) -> int:
         return 0
 
     if "--type" in argv:  # the whole pipeline minus the microphone
-        print("Type what you'd say (including the wake phrase). Ctrl+C to quit.")
+        hint = " (including the wake phrase)" if assistant.wake_required else ""
+        print(f"Type what you'd say{hint}. Ctrl+C to quit.")
         try:
             while True:
                 assistant.heard(input("say> "))