Make rules for usage of recently-added markdown features
those features being:
- [x] specifying custom ID (wiki only, added in ppy/osu-web#7258)
## Header {#with-custom-id} > Block quote {#with-custom-id-2} - [x] headers in news posts now generate ID like they do in wiki
- [x] headers at level >=4 now also generate an ID like <4 (news and wiki, added in ppy/osu-web#7544)
- [ ] infoboxes (wiki only, added in ppy/osu-web#7546)
- please only header >=4 within this, anything larger looks dumb
::: Infobox <!-- normal markdown here --> :::
more involved infobox example, it shows all of the styling that changes (note table header especially)
# Infobox test
::: Infobox
#### Heading

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
##### Smaller heading
| | |
| :-- | :-- |
| Property | It's a cat |
| Color | Blue and also here is more text sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium |
| More prop | ... |
:::
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Dolor magna eget est lorem ipsum dolor sit amet consectetur. Morbi tempus iaculis urna id volutpat lacus laoreet. Consectetur lorem donec massa sapien faucibus et molestie ac feugiat. Etiam sit amet nisl purus in. Sit amet nulla facilisi morbi tempus iaculis urna. Ultrices neque ornare aenean euismod elementum nisi quis eleifend quam. Odio tempor orci dapibus ultrices in iaculis nunc sed. Sed risus pretium quam vulputate dignissim suspendisse in est ante. Lectus proin nibh nisl condimentum id venenatis a condimentum vitae. Lacus sed turpis tincidunt id aliquet. Potenti nullam ac tortor vitae. Tortor condimentum lacinia quis vel. Morbi non arcu risus quis varius quam quisque id. Orci eu lobortis elementum nibh tellus molestie nunc non. Fames ac turpis egestas sed tempus urna et pharetra. Lobortis scelerisque fermentum dui faucibus in ornare. Sed pulvinar proin gravida hendrerit. Orci ac auctor augue mauris augue neque gravida.
Sit amet justo donec enim diam vulputate ut pharetra sit. Euismod in pellentesque massa placerat. Vel pretium lectus quam id leo in vitae turpis. Quis lectus nulla at volutpat diam. Lacus laoreet non curabitur gravida arcu ac tortor. Quis imperdiet massa tincidunt nunc pulvinar sapien. In nibh mauris cursus mattis molestie a. Nibh mauris cursus mattis molestie a iaculis at erat. Integer eget aliquet nibh praesent tristique magna sit amet. Rutrum quisque non tellus orci ac auctor augue mauris augue. Neque aliquam vestibulum morbi blandit cursus risus at. Eu feugiat pretium nibh ipsum consequat nisl. In mollis nunc sed id. Felis eget velit aliquet sagittis id consectetur. Eget gravida cum sociis natoque. Dictumst quisque sagittis purus sit amet volutpat consequat mauris. Velit egestas dui id ornare arcu odio ut sem. Nibh nisl condimentum id venenatis a condimentum. Enim facilisis gravida neque convallis a cras semper auctor neque.

side note: the identifiers only work with English for now: ppy/osu-web#8057
side note: infoboxes will be fully ready for use after ppy/osu-web#4257; until then, we probably should make images inside the infoboxes link to themselves
side note: infoboxes aren't displayed in osu!: ppy/osu#14614
for the record, GPR agreed to change the box syntax to that of the markdown library used in the osu! framework, and this requires some tinkering. will refrain from the usage for now: https://discord.com/channels/188630481301012481/218677502141399041/882819390213611550
Should this be closed everything looks done
there are no usage rules for infoboxes so no