BikePluck - MTB wall mount

## Compatibility
I designed this for my knobby enduro MTB tyres. Tested with:
- 2.30" Specialized Butcher - holds securely
- 2.35" Schwalbe Magic Mary - holds securely (knobs aren't touching, slight play)
- 2.50" WT Maxxis Assegai - holds very securely, probably upper limit

Originally designed for 2.3" Specialized Butcher tyres.
Lower limit is about 2.25", but it is heavily dependent on the tyre shape.
May work with 2.6" on less knobby tyres, not tested.

I also tested it with my 25kg eMTB, but it was definitely on the very upper limit, it held the wheel in place, but very little force was needed to pull it from it, so maybe don't use it for eMTBs or use stiffer material :)

## How to mount:
Mount on a wall at a height where the front wheel touches the wall when the rear wheel is on the ground, also touching the wall.

Before mounting, make sure the parts slide into each other, if they don't, you may need to modify your slicer settings.
If they fit, install the b