Add Voice Assistant Integration alongside CityBot

[cupnoodles7]

This implementation plans to add the following features:

1. Voice input capability using WebRTC for real-time audio streaming
2. Speech-to-text conversion using Google's Speech Recognition
3. Text-to-speech for bot responses using Google Text-to-Speech
4. A dual-input interface allowing both text and voice input
5. Audio playback of bot responses

[mahacodeCrafter7]

can you assign me this project

[mahacodeCrafter7]

@Jotthecode can you assign me this

[cupnoodles7]

@Jotthecode I'm still working on this, it'd be great if you could assign me this so that I can open a PR