Anycubic I3 Inductive Sensor Mount

Yet another anycubic I3 inductive sensor mount.

Requirements:
1. LJ12A3-4-Z/BY Inductive Sensor
2. two M3x6 screws

Here is the firmware: https://github.com/sean-liang/Marlin
I just forked Marlin 1.1.0-RC8 and adjusted the configurations accordingly.

In case you'd like to do some customization, here is the design: https://cad.onshape.com/documents/757bbe6b075b9321f7c9f42a/w/17b6fa045e0e5f85dc0936ca/e/93cf252434203573611b3458