Support NPZ output for LCAO H(R), S(R), and DM(R)

[pincher-chen]

Summary

• Add INPUT options out_hr_npz, out_hsr_npz, and out_dm_npz.
• Output LCAO H(R), S(R), and DM(R) matrices in NPZ format.
• Support nspin=1, nspin=2, and nspin=4 by adding complex HContainer NPZ output.
• Add input parsing tests and documentation entries.

Tests

• Built with MPICH ch3, ELPA, and CNPY.
• MODULE_IO_read_item_serial
• LCAO Si2 nspin=1 NPZ output smoke test
• LCAO H atom nspin=2 NPZ output smoke test
• LCAO noncollinear H atom nspin=4 NPZ output smoke test