feat: Add custom Codable initializer for Message struct to resolve decoding issues

fix: Remove initial value for `id` and set it in initializer

refactor: Remove CodingKeys to enable full Codable support for Message

fix: Exclude UUID from Codable encoding/decoding in Message struct

refactor: Reorder properties and initializer in Message struct

Fix a warning

Fix compiler error in example

Ignore aider files

refactor: Remove redundant systemPrompt parameter in chatAI.complete call

refactor: Explicitly pass nil systemPrompt in complete method call

Edit package file to make it easier to switch to local dependencies

Make Message Codable

Throw error when attempting to create API key with empty value

Handle system prompts

Reorganize