Generate crystal structures with MatterGen, magnetic density, and HHI score conditioning

Target magnetic density value in units of Angstrom^-3. Must be between 0.01 and 0.3.

A measure of market concentration. Higher values indicate more concentration.. Must be between 0.1 and 1.

Number of structures to generate in each batch. Must be between 1 and 64.

Diffusion guidance factor. Higher values produce samples that better match the target property but may be less realistic.. Must be between 0 and 10.