Changes

Summary

1. Create folder if not exists. (details)
2. Implement methods to handle fei generation. (details)
3. Implement methods to handle fei generation (2). (details)
4. Use EST fei generation. (details)
5. Update manifest.mf. (details)
6. Remove unused dep. (details)
7. Remove unused code. (details)
8. Add fei generator tests. (details)

Create folder if not exists.

Implement methods to handle fei generation.

Implement methods to handle fei generation (2).

Use EST fei generation.

Update manifest.mf.

Remove unused dep.

Remove unused code.

Add fei generator tests.