Enhance Copilot instructions with comprehensive best practices and guidelines#82

Copilot wants to merge 2 commits intodevelopcs-internship/cs-system:developfrom

copilot/fix-beedd176-8b26-454a-ae58-c14d4d8928adcs-internship/cs-system:copilot/fix-beedd176-8b26-454a-ae58-c14d4d8928adCopy head branch name to clipboard