Change from old bzip2 to newer and supported faster bzip3 or lbzip2 or other faster codec

See
https://github.com/iczelia/bzip3

And old bzip2: not updated since 2019
https://de.wikipedia.org/wiki/Bzip2
https://sourceware.org/bzip2/

Or parallel lbzip2
lbzip2 https://github.com/caius72/lbzip2

Bzip3 is faster by Silesia corpus benchmark

So a transition to lbzip2 or bzip3 or a new faster codec like Zstandard, lz4 or others should be done.

See https://github.com/inikep/lzbench

The issue names no files, tests, or entry points in FreeCAD-LibPack. Start by locating where bzip2 is selected or packaged for Windows, then determine which codec is acceptable; done requires an agreed replacement and a working build with that codec.

Written by the indexing model from the issue text.