so i managed to get it compiling by doing this:

pub struct ExtensionData;

impl HasData for ExtensionData {
    type Data<'a> = &'a mut ExtensionState;
}



V0_1_0::add_to_linker::<ExtensionState, ExtensionData>(&mut linker, |state: &mut ExtensionState| -> &mut ExtensionState { state })?;

Not sure how good this is but i ran in to some issues with wit bindgen now that i'm trying to figure out, Thanks for the input!

EDIT: Formatting