[idea] extend hf gallager to mifare classic.

[pingu2211]

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hf galagher commands are focused at desfire cards, this is fantastic as its the more secure of the available credential types. However, T10 and T15 readers accept mifare classic, mifare plus as well as mifare desfire, and mifare classic cards are more avalible in a range of form factors such as rings, and sub-dermal implants.

Describe the solution you'd like

Extend hf galagher to enable reading and writing to mifare classic cards, either as distinct commands or as parameters to hf gallagher read and hf gallager clone.

Describe alternatives you've considered
Doing this process manually, its well described by megabug.
https://github.com/megabug/gallagher-research/blob/master/formats/card-specific/mifare-classic.md.

Additional context
I'm looking at implementing this myself, as a gallagher desfire credential I use every day is in an inconvenient physical form factor. It will be my first contribution to this repository and I'd appreciate any advice, discussion and feedback during that process.