Use last messages as memory in example CLI.

Inquirer has been substituted with clack for extensibility.

Use basic chat implementation.

Add files relevant to config.

Implement proper calculation for prompt and completion tokens.

Include example project for consuming the client.

Remove message and combine types to chat.

Also use correct package name.

Reduce coupling by putting types and definitions in their appropriate
files.

Chat utils for creating prompts and messages have been added.

Add files from pridepack. Only text completion, chat completion, edit,
and image generation features have been implemented.