fix display bug for admonition to callout conversion

[bayang]

The admonition plugin accepts parameters on the first 4 lines. These lines are displayed in the resulting html and the collapsing does not work.

For example in the following block :

ad-quote
title: Summary
icon: dice-five
collapse: open

content here

The rendered html shows the title, icon and collapse strings, and collapsing is broken.
See below :

The fix I propose tries to integrate the title, the collapsible state.
Unfortunately custom icon names and custom color are trickier to convert.
Below are some sample tests i made :

PS : I'll try to do some research and see if converting the admonition blocks directly in the obsidian plugin using the rendering functions of the admonition plugin might be better.

[oleeskild]

Thanks for creating a PR! I was surprised that this changed the rendering for admonition blocks as I was under the impression that admonitions were replaced with the obsidian native callout blocks, but that doesn't seem to be the case, as it seems to still be under active development.

As you mentioned, the icon part currently doesn't have any effect, but it does at least allow us to parse the admonition correctly. I'll merge it in. If you find a cleaner way to parse this using the rendering functions in obsidian itself, I'd be happy to accept a PR, as the current implementation easily breaks if any new features are added.