This commit introduces a new class, TestSuite, designed to encapsulate a collection of Task objects under a common timestamp. This will help in grouping tasks that belong to a particular test suite.
Key Features:
- Add a TestSuite class with fields for `timestamp` and a list of `tests` (Task objects).
- Implement `toJson` method for serializing TestSuite objects to JSON-compatible format.
- Implement `fromJson` factory method for deserializing JSON data back into a TestSuite object.
By providing serialization and deserialization support directly in the model, we facilitate easier storage and data exchange for test suites.
