Add Vento support

[wrapperup]

Hi, thanks for making this plugin! It's hard to find a good formatter for HTML templates.

Any chance that support for Vento could be added? https://github.com/ventojs/vento

If not, it would be nice to map filetypes to template types (ie, map .vto to Jinja to get some formatting), and add the ability to preserve whitespace around mustaches/tags/blocks.

Thanks!

[g-plane]

You can map file associations in dprint config.

[wrapperup]

You can map file associations in dprint config.

Right, but it only lets you map it to the plugin. It will format it as an HTML file and not as a jinja-like template.