Add support for making Text-To-Speech send regular text messages instead of notices

When speech-to-text/flow-type = `only_transcribe`, the bot will now send
text messages by default, not notices.

While notice messages may be less desirable with other bots in the room,
it's probably a better default for most people who enable "transcribe-only" mode.

This is an improvement related to https://github.com/etkecc/baibot/issues/14

src/utils/text_to_speech.rs

@@ -16,7 +16,7 @@ pub fn create_transcribed_message_text(text: &str) -> String {
 /// If the provided text string does not match the expected format, None is returned.
 ///
 /// It should be noted that in certain cases (Transcribe-only mode), transcriptions are posted as regular notice messages which do not include
-/// the `> 🦻` prefixing. This function will not handle these properly.
+/// the `> 🦻` prefix. This function will not handle these properly.
 pub fn parse_transcribed_message_text(text: &str) -> Option<String> {
     if !text.starts_with("> ") {
         return None;