Feature to convert markdown file to xml

[abhmul]

I was looking for a way to edit specific sections in my Obsidian files. For example, I keep journals in daily notes und er the "# Journal" section. I have some journal entries from other sources and I wanted a way to easily insert these entries into my "# Journal" section as a subsection.

I thought some kind tree-like format would work well for this, but most markdown libraries only converted one-way to HTML. I needed to convert back to markdown once I'd edited the tree-like version of the file.

So instead I implemented a bidirectional converter from Markdown to XML. It doesn't do anything fancy, just builds a tree of all the sections in the markdown files by looking at the number of "#" in front of a header.

I added plenty of tests for all the code possible cases I could think of.

Let me know what you think. I'm fine with moving the code around for better organization, but wanted y'all to look at it first.

[abhmul]

It looks like Git is not checking the tests, so here is proof that all tests pass.