⚠️ GitHub is beta testing their own Admonition syntax. We should weigh in

I have seen a couple of different implementations of admonitions in Markdown.
These are:

  1. > Using blockquotes (MS & Github).
    Like @pboling said, I don’t think this is ideal, since an admonition is not a quote.
  2. ::: Using three colons to start and end a block (Docusaurus & Quarto).
    This defines a clear boundary of and admonition block.
  3. !!! Using three exclamation marks (MKDocs).
    This implies importance and doesn’t really work well for a note or a tip admonition.

My preference would be to go for option 2.

I think using emoji is a good idea for keeping it easy to read in all languages:

::: ℹ️
This is some info
:::
::: 💡
This is a tip
:::
::: ⚠️
This is a warning
:::
::: 🔥
This is danger
:::

So, basically, what @bb010g already proposed

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