Snapmaker 2 5015 fan adapter

The Snapmaker 2 3D print head is not very good at print cooling. This is an adapter modification based on files shared in the [Snapmaker Forum](https://forum.snapmaker.com/t/3dp-part-cooling-fan-5015-replacement/10038) and remixed from them. I guess all started with [this Thing](https://www.thingiverse.com/thing:4614265)

There are two versions: one if you have long enough screws to reach down to the mounting plate, and one I created since I only had 10mm M3 screws at my hand. Its a bit more difficult to mount the fan, but with some careful wiggeling it nicely snaps into position.

You'll need longer M2 screws for the toolhead side plate - the file adds 2mm in thickness.