Add tenting support

[50an6xy06r6n]

Would be nice to have the ability generate a tenting solution, either via an added base, or built-in to the backplate/standoff configuration somehow. Not exactly sure how to deal with the screws going in at an angle yet.

[50an6xy06r6n]

Basic tenting added in 7a9dd94. Have plans for other options so I'll keep this open

[properlypurple]

It would be really cool to have support for something like this
https://www.thingiverse.com/thing:5259983

[50an6xy06r6n]

Will look into it whenever I revisit this project