Add Dummy Data and Unit Tests for CrateGen

[Karanjot786]

We need to create dummy data and implement unit tests for the CrateGen tool to ensure its functionality and reliability. This issue will cover both tasks to provide a comprehensive testing environment.

Tasks:

Create Dummy Data:

• Prepare sample JSON files for TES and WES to be used as input for testing.
• Ensure the sample data covers a range of scenarios to thoroughly test the conversion functions.

Implement Unit Tests:

• Write unit tests for TES to WRROC conversion.
• Write unit tests for WES to WRROC conversion.
• Ensure the tests cover edge cases and handle potential errors.
• Validate the functionality of the utility functions.