Move Author bios to Meta data

[tunetheweb]

Since we merged #1104 which had a prettier re-org this is easier.

A few issues/reasons not to do this:

1. Quotes still need unescaping which looks a little funny.
2. Some people Authored multiple chapters (e.g. Paul) so need two bios.
3. Can't easily reuse this data if we ever implement contributor bio pages as mentioned in Contributor profile pages #1195
4. Requires another bulk update to all the chapters 😞

Other than that, seems like a good thing to do.

[tunetheweb]

Will convert rest of chapters if happy to continue with this. So just a Draft PR to allow easy review until I do that.

[rviscomi]

Some people Authored multiple chapters (e.g. Paul) so need two bios.

Should be rare. Not sure if we have that problem this year. One thing to watch out for is consistency across chapters translated by different people. One cool thing would be some middleware that can support something like "bio: see chapter X" and the author's bio in chapter X gets reused.

Can't easily reuse this data if we ever implement contributor bio pages as mentioned in #1195

I think a middleware solution could be useful here. During the chapter generation script, extract the metadata and generate a new metadata file with all author info. Or if we go the bio page route maybe we have to maintain a standalone contributor bio metadata file anyway, and not couple it with the md at all.

Requires another bulk update to all the chapters 😞

In all, this looks like a good change, so I support moving forward with the rest of the chapters. Greatly appreciate your efforts ❤️