Add support for latte templates

[lubomirblazekcz]

This adds support for Latte PHP templates https://latte.nette.org/en/

[thecrypticace]

Will be in the next release. Nore that latte in this case is a language ID and not a file extension so you'll still need an appropriate VSCode extension to provide the language to the editor (I checked and there's like 4 extensions for this and one of them seems semi-recently updated).