It supports ATX-style headings from # through ######.
No. Setext headings are not currently supported.
Yes. Fenced code blocks using triple backticks or triple tildes are skipped while parsing headings.
The tree shows a placeholder message that no Markdown headings were found.
The H1 to H5 buttons control the initial visible depth of the tree.
Yes. Clicking a heading in the tree jumps the editor to that line.
Yes. The project targets Notepad++ on Windows.
No. Treat them as build outputs and keep them out of source control.