This enhances the `anilist auth` command by allowing the authentication token to be provided directly as an argument or from a file. This provides a non-interactive way to authenticate, which is useful for scripting or for users who have issues with the interactive browser-based flow.
The `auth` command now accepts an optional `token_input` argument.
- If the argument is a valid file path, the token is read from the file.
- Otherwise, the argument is treated as the token itself.
- If no argument is provided, the command falls back to the previous interactive method.
The README is also updated to document these new authentication options.
This commit also includes:
- `test`: Unit tests for the new authentication logic (``test_auth.py``) and for the mapper fix (``test_mapper.py``).
- `fix(api)`: A fix in the Anilist API mapper to handle potentially missing data in the API response, making it more robust.
- `style`: Minor code style and formatting fixes throughout the codebase.
