Ankermake Toolbox Holder

Based on the excellent design of [HelloRuiz: AnkerMake M5 Tool Case Holder](https://www.thingiverse.com/thing:6126035).

I just changed the direction of the long edge of the toolbox facing up.
Made it a little more compact on the printer.
It's just a preference.

I also added a **splitted version**, so you can change direction of the toolbox as you please.
(Search for *split* in the filename)

For the Ankermake M5 Users, I added the sliced GCODE file for PETG so you can directly print it.