Golang Termbot 2.0

Termbot 2.0 is basically an overhaul of the original Termbot, with the following changes:

• Overhauling of Termbot from Python to Golang, achieving a significant speed improvement!

I left out a couple features that I don't consider relevant for now:

1. /file: functionality for inline file contents' handling.
2. Additional LLMs apart from GPT-4 (Might add others in the future)