tweakpack: add fonts component

Just something to override the NORMAL font with a TTF one, since people seem to be struggling with doing it themselves. Easiest to just use whatever our demo uses, since most users will have it, but we could also bundle a few other choices. Eg. someone found trispace to be a good choice: https://www.fontmirror.com/trispace

Remember to use bold/black or whatever thicker styles they offer.