Release 3.0.0: Minor enhancements. Documentation.

[1plam]

In the past few days, the following updates have been made to the repository:

• Documentation with detailed information has been created, providing comprehensive guidance on various aspects of the project.
• Postman collections containing a set of requests to test the APIs have been added to the repository. These collections serve as a valuable resource for developers to validate and explore the functionality of the APIs.

These recent additions contribute to improving the overall usability and developer experience of the project. They provide clear documentation and readily available tools for testing and interacting with the APIs.