Refactor: Rename map to record

This commit renames `Map` to `Record` and updates all related AST nodes,
binders, type checkers, and runtime values to reflect this change. This
is a semantic change to better align with common programming language
terminology.

src/ast/compiler/specializer.rs

@@ -90,10 +90,11 @@ impl Specializer {
                 let elements = elements.into_iter().map(|e| self.visit_node(e)).collect();
                 (BoundKind::Tuple { elements }, node.ty)
             },
-            BoundKind::Map { entries } => {
-                let entries = entries.into_iter().map(|(k, v)| (self.visit_node(k), self.visit_node(v))).collect();
-                (BoundKind::Map { entries }, node.ty)
-            },
+                        BoundKind::Record { fields } => {
+                            let fields = fields.into_iter().map(|(k, v)| (self.visit_node(k), self.visit_node(v))).collect();
+                            (BoundKind::Record { fields }, node.ty)
+                        }
+            ,
             BoundKind::Expansion { original_call, bound_expanded } => {
                 let bound_expanded = Box::new(self.visit_node(*bound_expanded));
                 (BoundKind::Expansion { original_call, bound_expanded }, node.ty)