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

[pincher-chen]

Updated this PR with a new commit:

• NPZ output files are now written under OUT./ via PARAM.globalv.global_out_dir.
• Added integration tests for out_hr_npz, out_hsr_npz, and out_dm_npz in tests/03_NAO_multik.
• Verified locally with the ch3 MPICH build and yhrun -p debug (computing on NSCC-GZ supercomputer cluster).

The new commit is 9d56021.

[pincher-chen]

Fixed the failed 03_NAO_multik CI issue in commit f467bd298.

The NPZ runtime tests require CNPY, but they were previously included in the default CASES_CPU.txt. I moved them to
CASES_CNPY.txt and registered the new 03_NAO_multik_npz test only when ENABLE_CNPY=ON.

[mohanchen]

LGTM, thanks.