MaderHatt3r

So I managed to build an unsigned version of the dmg (Mac version) for arm and x86 using the code from the original repository and an update to mermaid 10.9.1...

Aha. I didn't add any new tests or run the existing ones. I will have to check that later..

> > Don't over-format headers: Header blocks do not need additional formatting like bold and italics. Let's strip the plain text for this conversion. > > I am not sure...

> but I would be surprised if you mean you want this when, say, [a couple words in the heading are italicized](https://docs.google.com/document/d/1tZ7s7liAh5l-w7Eu7Meej9JfMpUItnyJ3q2yC6juB3c/edit?tab=t.0#heading=h.p5u4g7pogmv8) Oh wow I had not thought about emphasizing...

Note: I reverted the continuous code block and stripping-formatting-from-headers commits from this PR for now to put into their own PRs later.