Various progress, doesnt compile

Added prelude, made lambdas a single-token prefix like NS, made progress on implementations, removed const line type

orchid-api/src/system.rs

@@ -5,7 +5,7 @@ use orchid_api_derive::{Coding, Hierarchy};
 use orchid_api_traits::Request;
 use ordered_float::NotNan;
 
-use crate::{CharFilter, ExtHostReq, HostExtNotif, HostExtReq, MemberKind, TStr};
+use crate::{CharFilter, ExtHostReq, HostExtNotif, HostExtReq, MemberKind, TStr, TStrv};
 
 /// ID of a system type
 #[derive(Copy, Clone, Debug, Hash, PartialEq, Eq, PartialOrd, Ord, Coding)]
@@ -63,6 +63,7 @@ pub struct NewSystemResponse {
 	pub lex_filter: CharFilter,
 	pub line_types: Vec<TStr>,
 	pub const_root: HashMap<TStr, MemberKind>,
+	pub prelude: Vec<TStrv>,
 }
 
 #[derive(Clone, Debug, Coding, Hierarchy)]