Compact Heat Bed Wedge Jack

UPDATE (2023-09-13): Uploaded an improved version (v6.0)
- Larger surface area for the platform
- More robust design for the bolt retaining scheme
- Easier assembly
- Adjustment range : 12~16.5mm (1mm taller)

Original Summary:
A totally unnecessary remix of [Av8er](https://www.thingiverse.com/Av8er)'s [Low Profile Adjustable Bed Wedge](https://www.thingiverse.com/thing:3024377) and [dfrechette](https://www.thingiverse.com/dfrechettein)'s [Wedge Jack](https://www.thingiverse.com/thing:5241366).

I made it 2 mm taller than Av8er's model so that I can use it for my Anycubic Mega Pro's Ultrabase heated bed which sags in the middle for some reason. The modded frame provides a range of 11~15.5mm.

I also incorporated dfrechette's idea for guiding grooves for the wedges so the assembled model would be held together. The roof concept, however, would have added too much height for my needs, so I added a dovetail feature on each wedge so the upper and lower wedges are held together,