Enhance/33 close interpreter window when sys.exit called

[Lin1st]

Resolves #33

Key changes:

1. Introduced a cunstom InterpreterExit exception in Python to signal interpreter termination
2. Mapped InterpreterExit to a Java-side exception GhidrathonInterpreterExitException to break out of the interpreter input thread
3. Gracefully shut down interpreter components (inputThread, console, interactiveScript, and interactiveTaskMonitor) when sys.exit() is called
4. Re-registered a fresh interpreter panel via InterpreterPanelService to ensure Ghidrathon remains available in the Ghidra’s menu after exit and let the user activate it manually later

Note: Clicking the close [X] button in the interpreter window only hides it (Ghidra's standard dockable panel behavior(?)). However, calling sys.exit() now performs a full shutdown and re-registration of the console

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