Update README

examples/fonts/README

-Use Facetype.js to generate typeface.json fonts.
-http://gero3.github.io/facetype.js/
+## MgOpen typefaces
+
+# Source and License
+
+https://web.archive.org/web/20050528114140/https://ellak.gr/fonts/mgopen/index.en
+
+# Usage
+
+Use Facetype.js to generate typeface.json fonts: https://gero3.github.io/facetype.js/
+
+Collection of Google fonts as typeface data for usage with three.js: https://github.com/components-ai/typefaces