Refactor code

[bvernoux]

• [x] Refactor code for nfc/dnfc/nfc bbio mode before to release the v0.3

  • [x] nfc/dnfc/nfc bbio mode refactoring / cleanup
    • https://github.com/hydrabus/hydrafw_hydranfc_shield_v2/commit/77ea467a6d4165111438fb19f9155696275e3ebe
  • [x] nfc/dnfc/nfc bbio modes refactoring cleanup (removed some headers)
    • https://github.com/hydrabus/hydrafw_hydranfc_shield_v2/commit/b2bb3a39e69eb2c7b978cbffb449338e4f6b46e6
    • https://github.com/hydrabus/hydrafw_hydranfc_shield_v2/commit/9db3eab1a04fe45252f543e126eaa997fd146123

• [x] RAM optimization

• https://github.com/hydrabus/hydrafw_hydranfc_shield_v2/commit/caf1bd1a84039d6b17db756c8f3746aae3bff8c8

• https://github.com/hydrabus/hydrafw_hydranfc_shield_v2/commit/f58614783e3b5826b7b9794188db7f0a22858b3b