Nintendo Switch Pro Controller Holder/Mount

[This model is also available on Maker World](https://makerworld.com/en/models/1451064-nintendo-switch-pro-controller-holder-mount)
I couldn't find an optimal version of this online so I remixed this model from NamelessParanoia.

This remixed model now solves most of the issues I had with other models online:
- Goes on without scratching either the Switch or the Pro Controller
- Has a centered mass of gravity in a regular holding position
- Doesn't stick so far out which would apply uncomfortable torque on the hands

I also optimised the original model so it would use the docking pin holes to hold the switch in place (thanks kevinwesterlink).