Additional block types

[mcginty]

This is a list that will need to be updated as Notion fills out their API support.

• [x] Columns (they behave similarly to blocks with children, so this is mostly a styling challenge)
• [ ] Embeds (may or may not actually want these)
• [ ] External images
• [ ] Toggles
• [ ] File/PDF
• [ ] Equation (KaTeX support needed)
• [ ] Bookmarks
• [ ] Table of Contents (maybe)
• [ ] Links to other blog posts by their internal Notion links