Zanshin-sdk-python

Update schedule format to newest required by the API

- New documentation.

Added new features:
- Manage scan target groups (support for Oracle scan target type).
- Missing operations on organizations (create/delete).
- Support for Google Workspace.

* Updated Client methods to include language, search, order and sort parameters when available on the API;
* Fixed type hints in Client._get_alerts_page and Client._get_alerts_following_history_page;
* Added type validation for existing search parameter to ensure it's a string;
* Fixed usage of string enum values in request bodies by using .value.