This commit introduces substantial improvements to the TaskView class to accommodate both tasks and test suites in a unified view. It also integrates the TestSuiteDetailView to display test suite details when a test suite is selected.
Key Enhancements:
1. Modified the `initState` method to call `fetchAndCombineData()` from TaskViewModel, thereby populating the combined data source.
2. Replaced the ListView that was rendering tasks with a ListView that can render both tasks and test suites.
3. Introduced conditional rendering for TestSuiteDetailView when a test suite is selected.
4. Updated onTap actions to select and deselect tasks and test suites appropriately.
5. Moved to using a Stack layout to allow overlay of TestSuiteDetailView on top of the existing layout.
This refactor enhances the TaskView's capabilities to manage and display both tasks and test suites, offering a more integrated user experience.
