Rewrite Zero Point One engine with modern search

[mastercoder26]

Summary

• rebuild the Zero Point One bot around reversible move structures that handle both board moves and drops cleanly
• add iterative-deepening negamax with alpha-beta pruning, quiescence search, and history-based move ordering
• refresh the command-line driver to use the new engine for start placement, move parsing, and play loop management

Testing

• python3 -m py_compile 123.py

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Codex Task