Add go.mod grammar

[andrerfcsantos]

I think a pretty nice addition to the list of grammars supported by default would be tree-sitter-go-mod to parse the contents of go.mod files.

My use case is I'm using tree sitter to parse and analyze some Go code, and as part of that, some things I want to implement require me to read go.mod .Would be nice to use tree sitter for this.

[smacker]

Hi @andrerfcsantos ! You can add any grammar to you project with a simple binding file like here: #58