Enable swift-testing by default and migrate all test case

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (ac6fbe5) 13.05% compared to head (1f7b888) 13.07%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #15 +/- ## ========================================== + Coverage 13.05% 13.07% +0.01% ========================================== Files 133 133 Lines 2091 2088 -3 ========================================== Hits 273 273 + Misses 1818 1815 -3 ```

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