Custom Speechrecognition lang，Support for other languages

[shaonianzhentan]

Speech recognition is great, but it doesn't support Chinese

I hope users can customize it. At present, the default is en-US

https://github.com/home-assistant/frontend/blob/dev/src/dialogs/voice-command-dialog/ha-voice-command-dialog.ts

this.recognition = new SpeechRecognition();
this.recognition.interimResults = true;
this.recognition.lang = "en-US";