Add Inline Type Hints to Sway-Server

[leviathanbeak]

[leviathanbeak]

Currently the requests to support this feature at LSP protocol level are still open and in discussion. Same goes for Node.js implementation here. As for Rust, Rust-Analyzer implemented this feature on their own, both on Client and on Server.

[JoshuaBatty]

Inlay hints for variables were added in #3015.

Closing this issue. Individual issues for specific inlay hints can be opened for each feature.