Cookie-api

This update implements the new error response syntax and retrieves the error message directly from the API.
- `CookieError` is now raised with additional information when an unexpected error occurs
- Added `QuotaExceeded` error
- Removed `GuildNotFound` and `UserNotFound` errors (use `NotFound` instead)
- Added unit tests

- Added support for Python 3.13
- Updated base URL for Cookie API

The API can now be used both synchronously and asynchronously. (3)
- `CookieAPI` has been renamed to `AsyncCookieAPI`
- `httpx` is now used instead of `aiohttp`
- Added image example
- Added example page to docs (4)

Initial release with a basic wrapper for the CookieBot API and documentation.