[Infra] Build bridge / interop between Langium and a Haskell-side / `lam4-backend` 'language server' / language services provider

[ym-han]

Why

To support things like viewing a rendering (either a 'natural-language-y' rendering or visualizations) in a pane in the IDE

Useful

Langium interop

• The java-server x langium interop in https://github.com/BBx-Kitchen/bbj-language-server/blob/4b3c8761a35f5e86475544474831a5e9dedc8933/bbj-vscode/src/language/java-interop.ts https://github.com/search?q=repo%3ABBx-Kitchen%2Fbbj-language-server%20JavaInteropService&type=code

Resources re building a LSP server in Haskell:

• https://dodisturb.me/posts/2023-09-30-Haskell-LSP-Laboratory.html
• https://github.com/haskell/lsp
• https://github.com/discus-lang/salt/tree/master/src/salt/Salt/LSP

Other TODOs

• Need to also look into how to not make this too tied to VSCode / make it portable to other LSP-supporting editors