Add fonts for Church Slavonic support

[typiconman]

Add Ponomar Unicode font, which would provide the necessary glyphs for Church Slavonic.

• The repository is here: https://github.com/typiconman/fonts-cu
• The binary fonts are here: https://sci.ponomar.net/fonts.html

It would be nice to add some of the other fonts as well, but at least Ponomar Unicode is needed for proper support of Church Slavonic.

[typiconman]

Any chance this can get resolved some time soon?

[typiconman]

Biweekly ping.

[typiconman]

Still nothing on this issue. Too bad; the lack of an OCS font makes it very difficult to use Google Docs to collaborate on OCS projects.

[typiconman]

Quarterly ping.

[davelab6]

@typiconman emailed fonts@ and mentioned https://github.com/slavonic/Pochaevsk is now following the template. @chrissimpkins could we queue this up for Q4? I put this as a two star project as its mentioned this work is being maintained under OFL and for our standards to enable workspace collaboration on slavonic texts. The color fonts aspect could also be interesting, with the ornate drop caps

[typiconman]

I created also a repository for the Triodion font.

[davelab6]

Excellent! Please file an "add font" issue for it @ https://github.com/google/fonts/issues/new/choose :)

[davelab6]

I see #7982 now - thanks!

[typiconman]

Also added Shafarik, see #8012.

[typiconman]

Added Ponomar, see #8156.