⚡ use uuid crate to parse UUIDStego

[ElaBosak233]

Summary

This PR improves UUIDStego decoding performance in ret2script by replacing the previous regex-based implementation with the uuid crate.

Benchmark

UUID parsing benchmark results:

Implementation	Hyphenated UUID	Non-hyphenated UUID	Speedup
regex	42.14 µs	34.66 µs	1x
uuid	35.6 ns	35.1 ns	~1000x

The uuid crate is approximately 1000x faster than the previous regex-based approach.