Support '% My Title' as visible title

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Hi and thanks for a great work!
It's often important to give a title to a document, and have it displayed on the document's body.
Yes, all kinds of metadata may be desirable, but most of those can be included at text level, whereas the title should be visually more conspicuous than a h1.
Some extensions to markdown provide ways to specify a title, such as
% My Title Here
Could MacDown support that? It should set the html>head>title tag and show the title in a h1, preferably with larger type than th eother h1s.
Thanks!
It's often important to give a title to a document, and have it displayed on the document's body.
Yes, all kinds of metadata may be desirable, but most of those can be included at text level, whereas the title should be visually more conspicuous than a h1.
Some extensions to markdown provide ways to specify a title, such as
% My Title Here
Could MacDown support that? It should set the html>head>title tag and show the title in a h1, preferably with larger type than the other h1s.
Thanks!

Start by locating MacDown's Markdown-to-HTML parsing and document-rendering entry points; the issue names no files or tests. Verify how a leading "% My Title Here" is currently handled, then define done as setting the HTML head title and displaying a visually distinct body heading without changing ordinary headings.

Written by the indexing model from the issue text.