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/tco.rs

@@ -141,6 +141,11 @@ impl TCO {
                 addr: *addr,
                 name: name.clone(),
             },
+            BoundKind::FieldAccessor(k) => BoundKind::FieldAccessor(*k),
+            BoundKind::GetField { rec, field } => BoundKind::GetField {
+                rec: Box::new(Self::transform(Rc::new((**rec).clone()), false)),
+                field: *field,
+            },
             BoundKind::Nop => BoundKind::Nop,
             BoundKind::Expansion {
                 original_call,