Replace uncompress with a pure Mojo version

[fnands]

The goal of Mimage is to be a pure Mojo library.
Right now, it uses the ZLib uncompress function written in C(?).

This should be replaced once a Mojo version is available.

mimage/mimage/utils/compression.mojo

Line 28 in bee72ee

fn uncompress(data: List[Int8], quiet: Bool = True) raises -> List[UInt8]:

[fnands]

This would be a good place to start: https://pyokagan.name/blog/2019-10-18-zlibinflate/