Malal3D's Basic Bases

Will be gradually updating my bases to this new format, which includes anti-warp supports, magnet slots and my logo, and just update this file whenever I add new ones. Basically just a quality of life update with techniques I've learnt over the years.

For now it includes files for:
- 32mm textured round base with one 5x2mm and one 3x2mm magnet slots.
- 40mm textured round base with one 5x2mm and two 3x2mm magnet slots.
- 100mm flat round base with twelve 5x2mm magnet slots.