Add Less support

[dkoprowski]

I see that we have SASS support here. Unfortunately I've less files in my project. There is also webpack so no way to specify path to compiled files.

It would be complete solution if we have less support.

[Nadrajkowski]

Same here, forced to use less at work and this would be very nice to have.

[muuvmuuv]

You can add other extensions by adding this to your VSCode settings: "html-css-class-completion.includeGlobPattern": "**/*.{css,html,less}",