List the tools that support this callout style (? and alternatives for reference)

[rufuspollock]

Worth mentioning other platforms / tools using this callout style e.g.

• Obsidian
• Microsoft Learn https://learn.microsoft.com/en-us/contribute/markdown-reference#alerts-note-tip-important-caution-warning

Also perhaps mention in appendix of the README the other main approaches (see note below)

Tools using this callout style

Microsoft Learn

> [!NOTE]
> Information the user should notice even if skimming.

> [!TIP]
> Optional information to help a user be more successful.

> [!IMPORTANT]
> Essential information required for user success.

> [!CAUTION]
> Negative potential consequences of an action.

> [!WARNING]
> Dangerous certain consequences of an action.

Other main approaches

Github beta direction - community/community#16925 (btw this discussion has a lot of good info and summary)

> **Note**
> This is a note

> **Warning**
> This is a warning

Triple colon which was what markdown:

:::note
This is a note
:::

:::warning
This is a warning
:::

Emoji style in blockquote on readme.io - https://rdmd.readme.io/docs/callouts

> 👍 Success
> 
> Vitae reprehenderit at aliquid error voluptates eum dignissimos.