Add Swift Bindings

[cengelbart39]

The Swift Package manager can build C and C++ sources and use headers to expose functions to Swift.

These additions and modifications allow the SPM to use the Julia Tree Sitter and for use in Swift apps.

[savq]

I know nothing about swift, but if the other grammars have this, I guess it's fine.

Could you remove the .DS_Store file? (If you're developing on a mac it's a good idea to put it in your global gitignore)

[cengelbart39]

@savq Should be good to go now.

[savq]

Thanks 👍