Issue Type: Feature Request

When I write documentation in JavaScript or TypeScript and hit Enter, VS Code appends * so I can keep writing documentation without dealing with comment syntax on the next line. I would love to have that opportunity when writing SassDoc as well.

I experimented with an updated language-configuration.json in an extension I maintain, which seems to do the trick. Would love to have this land upstream so I can avoid duplicating the whole language configuration for SCSS.

{
  "onEnterRules": [
    {
      // Continue with a docblock line when in that context
      "beforeText": "^[\\s]*///.*$",
      "action": {
        "indent": "none",
        "appendText": "/// "
      }
    }
  ]
}

Here's a screen recording demoing the difference in experience today.

And here it is with the additional onEnterRules.

VS Code version: Code 1.67.2 (Universal) (c3511e6, 2022-05-17T18:20:57.384Z)
OS version: Darwin arm64 21.5.0
Restricted Mode: No