ESP32 Devkit v4 Snap-Fit Case

This is a Snap-Fit Case for the latest ESP32 Devkit v4, which has (compared to the Devkit v1) a smaller PCB without screwholes and where the antenna is sticking out. As far as i can tell, there are no other cases for the the Devkit v4, which i why i made a custom one.

Features:
- hole for status LED
- two integrated buttons
- snap-fit top and bottom shells
- pin breakout supported (male & female)
- both STL's and FreeCAD files

Configuration:
- fully enclosed (no pin breakout, just the bare board in a case)
- pin breakout to the bottom (breadboard compatibililty)
- pin breakout to the top (typically usefull for projects)

...just pick the corresponding top and bottom part for the case.

Note:
- Wether you want to use male or female pin headers is your choice and most likely depends on you projects configuration and needs. The dimensions in the pin-breakout allow for both, as they are of the same size.

- The Snap-Fit mechanism requires some force to close and a spun