Add support for AI model temperature selection through CLI or environment variables

[uday-rana]

Is your feature request related to a problem? Please describe. AI model temperature is limited to provider default.

Describe the solution you'd like Add support for users to specify the AI model temperature by:

• Providing a --temperature or -t flag in the command-line interface.
• Enabling selection through an environment variable.

If no temperature is specified, a default should be set.

Describe alternatives you've considered N/A

Additional context N/A