Export Text Block in Other Markdown Flavors

It would be nice to have some customizations to the markdown export formatting. I know a lot of static generated sites and markdown editors typically support callouts/admonitions (aka text blocks in Folge), and being able to export using either a list of popular formats or providing the user the ability to implement a custom call out during export would be a nice feature and represent the Folge document more closely. For example, here's some likely popular examples, Obsidian and GitHub both use the following format, > [!{callout type}] {title of callout} > Callout text VueJS uses the following format (aka containers), :: {callout type} {title of callout} Callout text :: MKDocs uses the following format (aka admonitions), !!!! {callout type} "{callout title}" Callout text is indicated by the next line, indented by four spaces