support for helix editor

[hemedani]

just add supporting for helix editor

[webdev23]

Could you add a bare configuration, and some usage example?

There is no documentation, no -h or --help params available, nothing in the source code, that's pretty dark. In my Helix config.toml, with llm-js available in PATH, tried:

[language-server.llm-ls]
command = "llm-ls"
timeout = 5