Broader syntax definition support

[jmacdonald]

Amp currently relies on syntax definitions included in syntect, which is convenient but not comprehensive (e.g. Nix isn't included in that list). It would be great to build a system to vendor these and others so we can start to grow the list of languages/formats supported out of the box. For languages/formats that don't have preexisting syntax definitions available, this would be an area where users can contribute to Amp by creating ones for file types they use.

The system used by bat may be useful as inspiration.