Open
Description
Similar to #472 / #518, it would be great to be able to ==highlight== inline text.
Motivation
I'm working on a markdown editor for a note taking app that lets you edit the rendered markdown similar to Bear or Obsidian. For developers, highlights feel obscure (GitHub doesn't support them and I don't miss them) but for students it's a big deal. The "Seamless Markdown" section on Bear's website features a gif demonstrating markdown and highlighting is the first syntax they show. Obsidian also supports highlights. I'm just looking to match the competition.
I'm open to contributing if this is a change you'll accept. Is this a good first issue?