Support binary LCAO wavefunction input

[goodchong]

Summary

• add read_wfc_lcao to select text (1) or binary (2) LCAO wavefunction input without format detection or fallback
• read the native out_wfc_lcao 2 layout for Gamma-only and multi-k calculations, including type conversion and file/index/dimension validation
• pass the selected format through LCAO, TDDFT, and LR readers and document the input/output workflow
• generate binary fixtures at test runtime with the existing writer and cover double, float, complex, skipped bands, mismatched formats, truncated input, and existing text input

Binary compatibility

The reader intentionally follows the existing native int/double writer protocol. It does not add magic/version fields or cross-ABI, cross-endian compatibility, and it does not read files accumulated with out_app_flag.

Verification

• cmake --build build --target abacus_basic_omp -j2
• OMP_NUM_THREADS=1 ctest --test-dir /tmp/abacus_wfc_binary_mpi_mpicxx --output-on-failure -R 'MODULE_IO_(read_item_serial|read_wfc_nao_test|write_wfc_nao)' (5/5 passed, including 2-rank MPI)
• Gamma-only and 8-k-point out_wfc_lcao 2 -> read_wfc_lcao 2 end-to-end runs with OMP_NUM_THREADS=1
• ./build/abacus_basic_omp -h read_wfc_lcao
• ./build/abacus_basic_omp --check-input for both end-to-end inputs
• regenerated docs/parameters.yaml and docs/advanced/input_files/input-main.md; fresh generation matches both files
• git diff --check
• python3 tools/03_code_analysis/agent_governance_check.py --staged --format text

#6206