Progress: Continue working on completing the remove program.

Progress: Continue working on completing the remove program.

Make sure to not set the `kt_remove_main_flag_option_type_d` for the "different" and "same" parameters.
Make sure to not set the `kt_remove_main_flag_option_used_d` for the "empty" parameters.

The `kt_remove_flag_file_operate_recurse_d` flag is being set on a directory, but it is always being set without regard to te recursive parameter.
Remove it an and just check the recurse parameter instead.

The empty not flag should be checked when checking empty states.

Remove accidental assignment of `kt_remove_flag_file_operate_remove_d` when `is` is true for the `kt_remove_preprocess_file_type()`.

Address the program unit tests.
Add the empty parameters in places where the tests were originally expecting the remove command to remove non-empty directories by default.

The directory tree tests were improperly returning false on the mocked empty for the parent directory after the child directory was mock deleted.

I'm currently investigating problems where the following does not work as expect:
```shell
clear ; md a/b/c ; touch a/b/file ; remove a/b/ -r +V ; t a
```

Cast the `flag_operate` when transfering to/from the `recurse.state.code`.