Document changes to what assets are delivered in new npm packages

[tay1orjones]

I'm excited to see this project moving to being a monorepo and publishing individual packages per-family to npm, like @ibm/plex-sans 🎉

I support the decision to only provide woff and woff2 assets moving forward. I also think it makes sense to only provide the hinted assets in cases where providing hinted and unhinted would balloon the npm package size past the limit that npm supports. From our support ticket with them:

The maximum package size is 256MB for a package tarball and there is a file limit of 65,000 files. We are unable to extend the package size limits.

This should be documented though - ideally in both the root readme.md, but also on the readme.md in each package folder.

[thewilkybarkid]

Is the @ibm/plex package deprecated?