Based on the language and the tutorial: https://idiomaticsoft.com/post/2022-04-25-lsp-xtext-tutorial-intro/
However, I choose to make a self-contained VSCode extension, which is based on: https://github.com/cdietrich/xtext-languageserver-example/
Guess the reason why it's not working:
- Problems with the vsc plugin (high chance).
- Problems with the server (med chance). 1 + 2. Problems with both.
- Problems with gradle (low chance).