[andino_firmware] Change 'd' command to read encoder digital input values

[jballoffet]

🎉 New feature

Summary

This PR repurposes the d shell command from reading an arbitrary GPIO pin via digitalRead() to reading the raw digital input value of an encoder channel (channel A or B, left or right encoder).

Test it

docker compose -f docker/compose.yaml run --rm dev pio test -e desktop
Container andino-firmware-dev-run-f12f4e9dd330 Creating 
Container andino-firmware-dev-run-f12f4e9dd330 Created 
Verbosity level can be increased via `-v, -vv, or -vvv` option
Collected 4 tests

Processing app/test_pid in desktop environment
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Building...
Testing...
PidTest.Initialize	[PASSED]
PidTest.ComputeOutputProportionalGain	[PASSED]
PidTest.ComputeOutputProportionalAndDerivativeGain	[PASSED]
PidTest.ComputeOutputProportionalAndIntegralGain	[PASSED]
PidTest.ComputeOutputProportionalDerivativeAndIntegralGain	[PASSED]
PidTest.Reset	[PASSED]
PidTest.SetTunings	[PASSED]
--------------------------------------------------------------- desktop:app/test_pid [PASSED] Took 0.64 seconds ---------------------------------------------------------------

Processing app/test_shell in desktop environment
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Building...
Testing...
ShellTest.ProcessInputEmpty	[PASSED]
ShellTest.ProcessInputMessageSingleCharacterCommandSingleArg	[PASSED]
ShellTest.ProcessInputMessageUnknownCommand	[PASSED]
ShellTest.ProcessInputMessageTwoCharacterCommandSingleArg	[PASSED]
ShellTest.ProcessInputMessageThreeCharacterCommandSingleArg	[PASSED]
ShellTest.ProcessInputMessageTwoArgs	[PASSED]
ShellTest.ProcessInputMessageThreeArgs	[PASSED]
ShellTest.ProcessInputMessageFourArgs	[PASSED]
-------------------------------------------------------------- desktop:app/test_shell [PASSED] Took 0.63 seconds --------------------------------------------------------------

Processing drivers/test_motor in desktop environment
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Building...
Testing...
MotorTest.Initialize	[PASSED]
MotorTest.Enable	[PASSED]
MotorTest.Disable	[PASSED]
MotorTest.SetPositiveSpeed	[PASSED]
MotorTest.SetNegativeSpeed	[PASSED]
MotorTest.SetZeroSpeed	[PASSED]
MotorTest.SetHigherThanMaximumPositiveSpeed	[PASSED]
MotorTest.SetLowerThanMinimumNegativeSpeed	[PASSED]
------------------------------------------------------------ desktop:drivers/test_motor [PASSED] Took 0.57 seconds ------------------------------------------------------------

Processing drivers/test_encoder in desktop environment
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Building...
Testing...
EncoderTest.Initialize	[PASSED]
EncoderTest.ReadIncreasingTicksCount	[PASSED]
EncoderTest.ReadDecreasingTicksCount	[PASSED]
EncoderTest.ReadChannelsDigitalValues	[PASSED]
EncoderTest.ResetTicksCount	[PASSED]
----------------------------------------------------------- desktop:drivers/test_encoder [PASSED] Took 0.62 seconds -----------------------------------------------------------

=================================================================================== SUMMARY ===================================================================================
Environment    Test                  Status    Duration
-------------  --------------------  --------  ------------
desktop        app/test_pid          PASSED    00:00:00.635
desktop        app/test_shell        PASSED    00:00:00.628
desktop        drivers/test_motor    PASSED    00:00:00.574
desktop        drivers/test_encoder  PASSED    00:00:00.624
================================================================= 28 test cases: 28 succeeded in 00:00:02.461 =================================================================

Checklist

• Signed all commits for DCO
• Added tests
• Added example and/or tutorial
• Updated documentation (as needed)

Note to maintainers: Remember to use Squash-Merge and edit the commit message to match the pull request summary while retaining Signed-off-by messages.