[ahmed7p]

Description

This PR fixes an issue where scripts could be registered with duplicate fully-qualified names across different types (classes, interfaces, and enums).

Changes

• Implemented a unified checkDuplicate check to globally prevent naming conflicts.

Before

// You could declare a class and an enum with the exact same name
class Name {}
enum Name {}

After

// Trying to use the same name shows an error now
class Name {}
enum Name {}