Add Separate SOCKS5 Proxy Configuration for GitHub Copilot

[erwusht]

As GitHub Copilot becomes increasingly integral to developers' daily workflows, currently, Copilot uses VSCode's global proxy settings, which may not be optimal for all users' needs.
Add separate proxy configuration options specifically for GitHub Copilot
Allow users to set a different SOCKS5 proxy for Copilot independently of VSCode's global proxy settings