Currently, the CLI changes all the underscores to dashes. I do not like this. Change this to have a unified style everywhere, so if it is a underrscore in the API, then it is an underscore in the CLI. Do not preserve

legacy details. Update all tests

Implemented unified underscore naming across the CLI.

• Commands: local_poly, five_moment_pressure, gk_rz
• Options: --file_name, --gas_gamma, --grid_indices
• Removed dash conversion and legacy dashed spellings.
• Updated tests, documentation, and examples.

Verification: 1679 passed, 6 skipped; 2 unrelated Kaleido export tests deselected due hanging. Focused suite: 95 passed. Entire-Checkpoint: 01M1PTNFHDJZKY88QR5YPVT11E