I3 MK3 Clone (Haribo, Self-Sourced)

This is a self-sourced I3 MK3 Clone. It currently is a near-exact replica of an I3 MK3 [Haribo](https://github.com/PrusaMK2Users/3030_Haribo_Edition), with the following deficiencies:

1. No Power Panic
2. The filament sensor is a standard IR optical sensor, not the PRUSA laser sensor.

It is likely that these parts will be cloned at some point (the power panic board could easily be cloned, but the sensors Prusa uses for the filament sensor are hard to come by.)

It runs a (slightly) modi