Resource page reorganization

I reorganized the resource page to be multiple pages for a bunch of reasons. Some changes as a result of that: More categories showing up on the sidebar. Also more specific warnings.

One of the things I wanted for this change was for the introduction to show up at the top of each applicable category. That’s working successfully.

Content note: Food related stuff below the break.

If you’ve been following my sourdough adventures on Mastodon and wondering why I haven’t linked any recipes yet … I added a sourdough section to the new baking page.