✍️ co-locate blog/docs contents and images

```
- /blog
  - /2025-07-05-naked-css
      - post.md
      - image-1.png
      - image-2.png
- /docs
  .. etc ..
```

@benmccann just posted https://bsky.app/profile/benmccann.com/post/3m27zru7a5s2i where I found https://www.content-collections.dev/ which might be a good fit.