Add project icon to README

- Added icon.png from screenshot
- Placed icon at top of README for visual branding
- Icon represents power/energy theme with disabled state

Author: Agent-Hellboy

README.md

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 <div align="center">
 
+<img src="icon.png" alt="MCP Server Fuzzer Icon" width="100" height="100">
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 **A comprehensive super-aggressive CLI-based fuzzing tool for MCP servers**
 
 *Multi-protocol support • Two-phase fuzzing • Built-in safety • Rich reporting • async runtime and async fuzzing of mcp tools*