Voice Command

since, i have got the TTS part now i want it to be made SPS application
for that we have the lower end that is TTS it will be functioning like:

```
Microphone
   ↓ takes command
Speech-to-Text (STT)
   ↓
Command Parsing
   ↓
Email Fetch (Gmail API)
   ↓
LLM Summarization
   ↓
Text-to-Speech (TTS)
   ↓ gives output
Speaker
```
