Reset conversation history

[ThatcherC]

Implement a way to clear out the ChatGPT history so a new conversation can be started.

[diegozea]

That's delete (d) in my list of commands as I have used r for regenerate: #17 (comment)
Maybe it can also be n or new chat.

[FedeClaudi]

It's just a matter of emptying the conversation dict: https://github.com/FedeClaudi/HelpGPT.jl/blob/7b0cd16beec96bba7a41506001271b74f945e474/src/HelpGPT.jl#L64

Though I must admit I like @diegozea's commands for better control.

[ThatcherC]

Yup! Should be a quick change, just tracking it here for now. I think what'll happen is I'll write a regular Julia function to clear out the conversation history first, and then later hook it into a command system like @diegozea's - I like that interface too.

[ThatcherC]

Address in #21! The conversation can now be reset with ReplGPT.initialize_conversation(). Next up will be putting together something like @diegozea's cool command interface so the conversation can be reset from within the ChatGPT> shell.