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/captures.rs

@@ -47,6 +47,15 @@ impl CapturePass {
                 };
             }
 
+            BoundKind::FieldAccessor(_) => {}
+
+            BoundKind::GetField { rec, field } => {
+                node.kind = BoundKind::GetField {
+                    rec: Box::new(Self::transform(*rec, capture_map)),
+                    field,
+                };
+            }
+
             BoundKind::Destructure { pattern, value } => {
                 node.kind = BoundKind::Destructure {
                     pattern: Box::new(Self::transform(*pattern, capture_map)),