Add a Convert JSON to type language server action

[JosephTLyons]

When writing Rust with rust-analyzer, you can paste JSON into a Rust file and use an action to convert it into valid Rust. If possible, an equivalent action for Gleam would be wonderful.

Screen.Recording.2025-03-11.at.12.59.15.PM.mov

[lpil]

Very useful! I'm not sure that having it be part of the language server is the best way forward though. It would mean making the compiler understand a superset of Gleam syntax which includes JSON and any other formats we'd want to support. That doesn't seem like something the core tooling of the language should do.

There are existing language-agnostic tools for thing, such as quicktype. Perhaps adding Gleam support to them would be a practical way to do this.