Support Markdown files .md

[softwarecreations]

Summary

Very simple feature request, add support for .md (markdown files).
No need to parse anything, when we press Ctrl-Q literally just
Pseudo code for logic

const selection = currentSelection ? currentSelection : currentLine;
if (selectionHasNoQuotes) {
   add first quote char around selection;
} else {
   cycle quote chars around selection;
}

Motivation

Make it easier to edit markdown files.

Additional context

I've added this to my config.cson

".md.source":
  "toggle-quotes":
    quoteCharacters: "\"'`*_"

So you can cycle the selection between

• Double quotes
• Single quotes
• Backticks
• Bold
• Italic