Implement api.output, announcevoice command, a bunch of other tts shit, etc etc etc buh

tts/espeak/index.js

@@ -5,7 +5,10 @@ module.exports=class extends BaseEngine {
 	constructor() {
 		super('ESpeak','wav')
 	}
-	async getSpeechFile(text, filepath, voice='en', params={}) {
+	getDefaultVoice() {
+		return 'en';
+	}
+	async getSpeechFile(text, filepath, voice=this.getDefaultVoice(), params={}) {
 		let proc=await spawn('espeak', ['-v', voice, '-w',filepath, '--stdin']);
 		proc.stdin.end(text);
 	}