resistor (voltage) ladder input for button assigned functions

I searched discord and docs but could not find this functionality.

Problem

Add resistor ladder (key1 in car stereos) button input

Besides using a single wire for multiple buttons in DIY projects, resistive ladder, known as key1 wire, is commonly used with steering wheel controls which could be used for wireless/wired gaming wheels
https://electronics.stackexchange.com/questions/99417/what-resistors-to-use-to-read-several-buttons-with-a-single-analog-pin

Solution

Assign ADC value (plus/minus threshold) to a function (button)

Do you plan to work on this feature yourself?

I'm trying to but I'm not a programmer to help with official code. From what I can tell, functions already exist to init and read ADC (analog addon) as well as to add inputs (io expander) that can be used to create voltage ladder addon.

Start by examining the existing ADC (analog addon) initialization and reading functions, then review the input-assignment paths and io expander support mentioned in the issue. Define how ADC values and thresholds map to button functions, and verify that each mapped button is reported correctly.