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/tco.rs

@@ -95,15 +95,15 @@ impl TCO {
                     ..node
                 }
             },
-            BoundKind::DefLocal { slot, value, captured_by } => {
+            BoundKind::DefLocal { name, slot, value, captured_by } => {
                  Node {
-                    kind: BoundKind::DefLocal { slot, value: Box::new(Self::transform(*value, false)), captured_by },
+                    kind: BoundKind::DefLocal { name, slot, value: Box::new(Self::transform(*value, false)), captured_by },
                     ..node
                 }
             },
-            BoundKind::DefGlobal { global_index, value } => {
+            BoundKind::DefGlobal { name, global_index, value } => {
                  Node {
-                    kind: BoundKind::DefGlobal { global_index, value: Box::new(Self::transform(*value, false)) },
+                    kind: BoundKind::DefGlobal { name, global_index, value: Box::new(Self::transform(*value, false)) },
                     ..node
                 }
             },