Function register_rdf_lang 

pub fn register_rdf_lang<L, H>(
    world: &mut World,
    language_id: &'static [&'static str],
    extensions: &'static [&'static str],
)
where
    L: Lang + Component + Default + Send + Sync + 'static,
    L::ElementError: 'static + Clone,
    H: LangHelper + Default + Send + Sync + 'static,

Register a language with the ECS world, handling all setup_world() boilerplate:

• Semantic token type registration in SemanticTokensDict
• CreateEvent observer for file detection by language_id or extension
• Diagnostics system scheduling
• Basic semantic highlighting scheduling

Call language-specific setup (parsing, completion, code actions, etc.) after this function.

Type parameters

• L: The language marker component (e.g. TurtleLang). Must implement Default.
• H: The language helper (e.g. TurtleHelper). Must implement Default.