Add support for *.html.slim filetypes

[apilot]

Tree-sitter supported by multiple editors, and enabling support for this format will empower these editors Slim-template

[amaanq]

The solution would be to create a grammar called "slim" that extends off the Ruby one to support these filetypes, not change the Ruby one itself

[apilot]

what is the best way to do this to include support? just in ruby itself there is already support for html.erb if I do not confuse anything. and it's the same in a different format.

[amaanq]

erb is embedded template, right? that has its own grammar