Add 3D Cube Chess Web Application with Full Feature Implementation#4

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copilot/fix-62b71d1b-a8dd-4917-8000-4e2860f13f1c

Commits on Oct 6, 2025

Initial plan
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Commits on Oct 7, 2025

Add 3D Cube Chess application with all core features

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salscodess
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Add comprehensive documentation and enhanced code comments

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