remove MANIFEST.in, add package-data in pyproject.toml

[codecov[bot]]

Codecov Report

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

Project coverage is 2.07%. Comparing base (6794354) to head (a738066). Report is 2 commits behind head on dev.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## dev #126 +/- ## ===================================== Coverage 2.07% 2.07% ===================================== Files 9 9 Lines 531 531 ===================================== Hits 11 11 Misses 520 520 ```

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