LSP: Support for go to definition navigation

[sanathusk]

Currently cmd clicking on function invocation does not go to function definition, similarly for module name as well. We could implement go to defination functionality for better developer experience

[phated]

Yes! This is definitely something we need.

Most of these features are defined in the Language Server Protocol specification, such as https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#textDocument_definition - so we should open them on the main Grain repo. This plugins repo doesn't do much anymore (other than defer to the CLI command). I'll move this over to the main repo

[marcusroberts]

This is definitely planned, and I had a proof of concept built, but we need to make some tweaks to the compiler output to make the locations available to jump to without bloating the output for normal compilation.

[sanathusk]

Will remember to open the issue on main repo next time.Thank you 🙏