MCP3421 Sensor support

[red-smeg]

Describe the problem you have/What new integration you would like

Hi I have a PH sensor Analogue, that I have connected to an MCP3421 ADC which outputs i2C on address 0x68. I would like a device support platform for this so I can add it to my YAML

Please describe your use case for this integration and alternatives you've tried:
tried using the external module but realized that was no longer supported

Additional context

The exact sensor connection is as follows:

BNC Electrode Probe Connector Hydroponic for PH Aquarium Controller Meter Sensor - > LMP91200MTX/NOPB -> MCP3421AOT-ECH -> ESP32

The device is detected by i2C at address 0x68 it is an 18 bit ADC.

datasheet is here.

https://ww1.microchip.com/downloads/aemDocuments/documents/OTH/ProductDocuments/DataSheets/22003e.pdf

[red-smeg]

it looks like someone did this.

https://github.com/bseibold/esphome-components/tree/main/components/mcp3421

is there anyway to get this added to the main library ?