Give GitHub Copilot CLI real code intelligence with language servers

The GitHub Copilot CLI relies on text search and binary extraction to understand code, which can be limited without the Language Server Protocol (LSP). The LSP Setup skill automates the installation and configuration of LSP servers for Copilot CLI, allowing the agent to perform more accurate and structured code analysis across 14 supported languages. This setup transforms the agent's functionality by enabling it to resolve types, jump to definitions, and find references with precision, similar to features available in editors like VS Code. The skill follows a structured YAML-based format to guide the installation and configuration process, including language selection, OS detection, server lookup, configuration, installation, and verification. Once set up, Copilot CLI can perform tasks with improved accuracy and efficiency, reducing the need for time-consuming text-based searches and enhancing the coding experience for developers.