Feature: Support For Reversed Polarity HE Trigger Add-on

[j-wut]

Reverse Polarity Support:

1. Renamed some variables to make sense with polarity change (ie: pressed, instead of max)
2. Renamed the Endpoints, getVoltage to get voltage, set Calibrations to set trigger settings.
3. Logic for Reverse Polarity (doing a similar strategy to Pokemon trick room logic, subtracting compared voltages and thresholds from ADC_MAX before comparison)

Rapid Trigger Support:

1. keeping state per channel for active state and previous voltage (to determine if the button is being pressed or released)
2. using previous state and voltage to determine if gamepad state should be active or idle
3. updating ui to add rapid trigger settings in calibration modal
4. mirroring logic in ui to accurately represent if trigger will be active/inactive

Refactoring:

1. Fixed some initialization in the he_triggers.h file
2. additional refactoring of code in the HETrigger Addon UI (based on my code style preferences, feel free to give opinions, I am willing to change code style if you have a strong reason)

Test Evidence:
https://youtu.be/C1dSXA4BfJc
https://youtu.be/5awZCg9uq2s
https://youtube.com/shorts/bbVyIoNNNvQ

[arntsonl]

Tested my hardware including some new reverse polarity switches I got as well as rapid trigger testing.

Thank you for the submission @j-wut !!!