Move normalizer rules to root of the repo

[subins2000]

Like how https://github.com/libindic/unicode-conversion-maps has the rules file in root of the project, make the same here

/rules/ml.rules

[asdofindia]

Good idea. I'll move now and see if it breaks anything.

[asdofindia]

Gotta implement https://importlib-resources.readthedocs.io/en/latest/using.html and https://setuptools.pypa.io/en/latest/userguide/datafiles.html#accessing-data-files-at-runtime

[asdofindia]

This makes python really hard. I'm reopening.

2c640e4