Add MyKey parser

[augustozanellato]

What's new

Added MyKey parser. MyKeys are a kind of cashless support used on vending machines that are very common in Italy. The parser was implemented without any reverse engineered cryptography (in contrast with the implementations used by other flipper firmwares), all the displayed infos are either stored plaintext on the tag or scrambled (the only usage of scrambled data is startingOffset at line 76), this choice was made in order to prevent angry lawyers :D

Verification

• Scan a MyKey (if you need a couple dumps feel free to DM me on Discord :) )
• Check the parsed data correctness

Checklist (For Reviewer)

• PR has description of feature/bug or link to Confluence/Jira task
• Description contains actions to verify feature/bugfix
• I've built this code, uploaded it to the device and verified feature/bugfix

[hedger]

@augustozanellato could you also provide sample card dumps to test that code, please?

[augustozanellato]

@augustozanellato could you also provide sample card dumps to test that code, please?

@gornekich already has them, feel free to send me a dm on discord if you also want some samples :)

[gornekich]

Thanks!