[CREATE] new HarfBuzz python demos project

[Hin-Tak Leung]

Hi,

All I wanted to do was to find the cause of a crash [1] of Win64 of Font Validator. It was caused
by HarfBuzz. So FontVal 2.1.2 was released with the fix. and the HarfBuzz python demos project
was born.

HarfBuzz is a text shaping library for complex script layout.

The HarfBuzz python demos project currently has one script: hb-view.py, a re-implementation of
some of the functionalilty of HarfBuzz's C++ based hb-view utilility, with some extra bells and
whistles. It uses pygobject and HarfBuzz's gobject binding, which is maintained within HarfBuzz.

It came with demos on 5 languages/writings: Sanskrit/Devanagari, Persian/Arabic, classical Mongolian, Phags Pa, and Japanese.

Have fun and happy drawing.

https://github.com/HinTak/harfbuzz-python-demos

[1] https://github.com/HinTak/Font-Validator/issues/27