Prusa MK2.5S Hemera Adapter

This is a remix of dima_leigr's v1.2 Hemera adaptor for the Prusa MK3S which has been modified so it hits the MK2.5S limit switch when homing the X axis.

*Notes for Prusa firmware*
A "variants" file for firmware 3.8.1 is included with the updated probe offsets - unzip "1_75mm_MK25S-RAMBo13a-Hemera.zip" into the Firmware/variants directory and then run PF-build.sh, choosing the "1_75mm_MK25S-RAMBo13a-Hemera" variant during the build process.

After flashing the firmware, do a M503 and check your e-steps:
Send: M503
Recv: echo:Steps per unit:
Recv: echo: M92 X100.00 Y100.00 Z400.00 E409.00

If E409.00 isn't shown, run the following commands to set your e-steps for the Hemera and save your settings:
M92 E409
M500

*Notes for Marlin firmware*
I'm now running Marlin 2.0 on a BTT-002 instead of the Mini-Rambo that comes with the MK2.5S. For my firmware configuration see here: https://github.com/davehng/marlinconfigs