Add credit card reader test (New)

[rickwu666666]

Description

Add test for credit card reader. We develop the test script according to the Verifone's credit card reader. However, we check if the device echo ACK \x06 back after sending out enquiry string \x05 which is a quite common method to check if serial device's connection established.

Resolved issues

Documentation

Tests

sideload result
https://certification.canonical.com/hardware/202511-38101/submission/469103/test-results/

[rickwu666666]

We have a credit card reader(verifone MX870) that is powered by USB port and communicate over serial port, which means checking device from the udevadm/lsusb output is not really mean that device connected and ready. Therefore, I will stay with current implamentation to send enquiry string to the device port and try to get the ACK form device.

[stanley31huang]

LGTM

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 54.88%. Comparing base (38b29e2) to head (f3006a4).
⚠️ Report is 47 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2300   +/-   ##
=======================================
  Coverage   54.88%   54.88%           
=======================================
  Files         412      412           
  Lines       44246    44246           
  Branches     8154     8154           
=======================================
  Hits        24284    24284           
  Misses      19132    19132           
  Partials      830      830           

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