Add symbol name to bound kinds

The `Get`, `DefLocal`, and `DefGlobal` bound kinds now store the symbol
name associated with the variable. This information is useful for
debugging and provides more context in the compiled output.

src/ast/compiler/binder.rs

@@ -104,7 +104,10 @@ impl Binder {
             
             UntypedKind::Identifier(sym) => {
                 let addr = self.resolve_variable(sym)?;
-                Ok(self.make_node(node.identity.clone(), BoundKind::Get(addr)))
+                Ok(self.make_node(node.identity.clone(), BoundKind::Get { 
+                    addr, 
+                    name: sym.clone() 
+                }))
             },
 
             UntypedKind::If { cond, then_br, else_br } => {
@@ -143,12 +146,14 @@ impl Binder {
                 // 3. Return Node
                 if self.functions.len() == 1 {
                     Ok(self.make_node(node.identity.clone(), BoundKind::DefGlobal { 
+                        name: name.clone(),
                         global_index: slot_or_idx, 
                         value: Box::new(val_node) 
                     }))
                 } else {
                     let captured_by = self.capture_map.get(&node.identity).cloned().unwrap_or_default();
                     Ok(self.make_node(node.identity.clone(), BoundKind::DefLocal { 
+                        name: name.clone(),
                         slot: slot_or_idx, 
                         value: Box::new(val_node) ,
                         captured_by