Refactor: Implement Record Layouts and Optimized Field Access

Introduces a new `RecordLayout` system for efficient and type-safe
record handling.

Key changes:
- `RecordLayout` struct with `O(1)` field lookup using FMap
  optimization.
- Field accessors (`.name`) are now first-class callable values.
- Parser recognizes dot-prefixed identifiers as field accessors.
- Binder and TypeChecker handle field accessors.
- Optimizer transforms field accessor calls into specialized `GetField`
  nodes.
- VM executes `GetField` efficiently by directly accessing record
  values.
- Adds a new `records.myc` example showcasing record features.
- Improves comparison logic for records to use pointer equality for
  layout.

src/ast/compiler/dumper.rs

@@ -66,6 +66,17 @@ impl Dumper {
                 self.log(&format!("Get: {} ({:?})", name.name, addr), node)
             }
 
+            BoundKind::FieldAccessor(k) => {
+                self.log(&format!("FieldAccessor: .{}", k.name()), node)
+            }
+
+            BoundKind::GetField { rec, field } => {
+                self.log(&format!("GetField: .{}", field.name()), node);
+                self.indent += 1;
+                self.visit(rec);
+                self.indent -= 1;
+            }
+
             BoundKind::Set { addr, value } => {
                 self.log(&format!("Set: {:?}", addr), node);
                 self.indent += 1;