Use a better font for the silkscreen

[bschwind]

Candidates:

• https://fonts.google.com/specimen/VT323?category=Monospace&preview.text=USB%20BOOT&preview.text_type=custom
• https://fonts.google.com/specimen/Roboto+Condensed?category=Sans+Serif,Display,Handwriting,Monospace&preview.text=USB%20BOOT&preview.text_type=custom
• https://fonts.google.com/specimen/Anybody?preview.text=USB%20BOOT%20R5%20SW27&preview.text_type=custom&category=Sans+Serif,Display,Handwriting,Monospace
• https://fonts.google.com/specimen/Barlow+Condensed?preview.text=USB%20BOOT%20R5%20SW27&preview.text_type=custom&category=Sans+Serif,Display,Handwriting,Monospace
• https://fonts.google.com/specimen/Chakra+Petch?preview.text=USB%20BOOT%20R5%20SW27&preview.text_type=custom&category=Sans+Serif,Display,Handwriting,Monospace
• https://fonts.google.com/specimen/Concert+One?preview.text=USB%20BOOT%20R5%20SW27&preview.text_type=custom&category=Sans+Serif,Display,Handwriting,Monospace

[bschwind]

Seems this isn't easy in the current version of kicad. Kicad 7 might have support for other system fonts, so I'll leave this out of v0.3.