gchq / gchq/CyberChef

Feature request: HC-256 & HC-128 Cipher

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Description

**Is your feature request related to a problem? Please describe.**
The cipher for HC-256 is missing.

**Describe the solution you'd like**
Please consider adding support for these ciphers

**Describe alternatives you've considered**
Using other tools or creating custom one off decoders is the current workaround

**Additional context**
The 256 vs 128 should be a rounds variable

https://en.wikipedia.org/wiki/HC-256
https://www.ecrypt.eu.org/stream/p3ciphers/hc/hc128_p3.pdf

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