Add biographies for 28 designers

Add biographies for 28 designers

This PR adds bio.html files for designers who were missing biographical
information in the Google Fonts catalog.

Designers added:
- Astigmatic (Brian J. Bonislawsky) - Yellowtail, Pacifico, Kaushan Script
- Anton Koovit - Museo, Calluna (Tipo foundry)
- Alexey Kryukov - Old Standard TT
- Christian Robertson - Roboto, Ubuntu
- Matt McInerney - Raleway, League Gothic
- Mark Simonson - Proxima Nova
- Pablo Impallari - Libre Franklin, Libre Baskerville, Lobster
- Adèle Antignac - Spectral (Production Type)
- Victor Gaultney - Gentium, Doulos SIL (SIL International)
- Font Diner (Stuart Sandler) - Limelight, Fruktur
- Georg Duffner - EB Garamond
- Frode Helland - Monokrom founder
- Paul D. Hunt - Source Sans, Source Serif, Source Code
- Dan Rhatigan - Adobe Type
- Barry Schwartz - Sorts Mill Goudy, Fanwood
- Alejandro Inler - Elsie
- Ralph du Carrois - Fira Sans, Fira Mono
- Carrois and Edenspiekermann - Fira family
- Dave Crossland - Cantarell, Google Fonts team
- LatinoType - Patua One, Sail (Chilean foundry)
- James Grieshaber - Mostra (Typeco)
- Kimberly Geswein - Indie Flower, Architects Daughter
- Sebastian Kosch - Crimson Text
- Juan Pablo del Peral - Almendra
- Friedrich Althausen - Vollkorn
- Daniel Johnson - Jura, Judson
- Andrey V. Panov - Istok Web
- Jovanny Lemonad - Philosopher, Yeseva One

Sources: GitHub profiles, foundry websites, Google Fonts metadata