Refactoring node to be immutable

Src/AST/Myc.Ast.Binding.pas

@@ -256,7 +256,7 @@ begin
 
                 // --- Replace Node ---
                 // Create a new TBoundIdentifierNode (implementation is in Myc.Ast)
-                var boundParamNode := TAst.BoundIdentifier(paramNode.Name, adr);
+                var boundParamNode := TAst.Identifier(paramNode.Name, adr);
                 // Replace it in the parameter array
                 N.Parameters[i] := boundParamNode;
             end;
@@ -345,7 +345,7 @@ begin
 
         // --- Replace Node ---
         // Create the new TBoundIdentifierNode (implementation is in Myc.Ast)
-        Result := TAst.BoundIdentifier(Node.Name, adr);
+        Result := TAst.Identifier(Node.Name, adr);
     end
     else
     begin
@@ -375,7 +375,7 @@ begin
 
     // 3. --- Replace Node ---
     // Replace the TIdentifierNode with a new TBoundIdentifierNode
-    N.Identifier := TAst.BoundIdentifier(N.Identifier.Name, address);
+    N.Identifier := TAst.Identifier(N.Identifier.Name, address);
 
     // 4. Mutate this declaration node
     N.IsBoxed := (FBoxedDeclarations <> nil) and FBoxedDeclarations.Contains(Node);