Support for WTC401SPI touch sensor

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

I'm requesting support for the WTC401SPI touch sensor. I've found this touch sensor in some ESP32 based LED lamps for the brightness and color controls.

[The datasheet and some example code can be found here.](http://en.wincomtech.com/Private/ProductFiles/5210978ec3799cfdd0d2.pdf)

**Please describe your use case for this integration and alternatives you've tried:**

I'd like to replace the firmware on some of these LED lamps with ESPHome, but in order to get the inputs working, support for this chip would be required.

**Additional context**

One lamp that uses an ESP32 and the WTC401SPI is the dLight.