feat: compile Endor await expressions through the source pipeline

crates/frontend/src/ast/generated.rs

@@ -3,7 +3,7 @@
 use super::Spanned;
 use crate::Span;
 pub const AST_SCHEMA_ID: &str =
-    "urn:endor:ast:sha256:ad2ac52943dd26e08395c0d2698861da98bb89c360241c4712c769de86709fd0";
+    "urn:endor:ast:sha256:c7c10c6a61158810fa55044f1aa79f3558ac18ca3be59cbf7f2499b5add8df5b";
 #[derive(Debug, Clone, PartialEq, Eq, serde::Serialize, serde::Deserialize)]
 #[serde(deny_unknown_fields)]
 pub struct AstDocument {
@@ -234,6 +234,7 @@ pub enum ExprKind {
     Number(String),
     String(String),
     Symbol(Name),
+    Await(Box<Expr>),
     Unary {
         operation: UnaryOp,
         operand: Box<Expr>,