docs: add showcase image to README.md

Author: mishl-dev

README.md

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 > **This tool is for educational and debugging purposes only.** Using it to gain an unfair advantage or perform exploits (such as item duplication) on multiplayer servers is a violation of most server rules and platform terms of service. The developers do not condone cheating/duping. Use this mod at your own risk and only where you have explicit permission.
 
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 A networking utility for protocol debugging and state synchronization testing.
 
+<img width="1365" height="697" alt="image" src="https://github.com/user-attachments/assets/b84ae327-eb51-4112-ab92-cca66619e079" />
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 ## Features
 - **Packet Control**: Delay or toggle outgoing packets.