Add VS Code Server GitHub Copilot setup guide

[Copilot]

User requested step-by-step documentation for setting up GitHub Copilot in VS Code Server (code-server).

Changes

• docs/VSCODE_COPILOT_SETUP.md - New comprehensive guide covering:

  • VS Code Server installation (script, manual, Docker)
  • Copilot extension installation and GitHub authentication
  • Configuration settings and keyboard shortcuts
  • Coding-only configuration (enable Copilot only for programming languages)
  • Troubleshooting common issues
  • Security considerations

• README.md - Added "Additional Documentation" section linking to the new guide

Security Notes

• Installation script instructions include option to download and inspect before execution
• Credential clearing commands use explicit paths with existence checks rather than wildcards

Original prompt

i have vs code server , i want use copilot just for coding in this editor , guide me stpe by step to do it setting

---

💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.

[shishehgar]

@copilot how to Configuring Copilot settings just used wip coding?

[Copilot]

@copilot how to Configuring Copilot settings just used wip coding?

Added a new "Coding-Only Configuration" section in fd2feb7. To use Copilot only for coding files, set "*": false and explicitly enable only programming languages:

{
  "github.copilot.enable": {
    "*": false,
    "python": true,
    "javascript": true,
    "typescript": true,
    // ... other coding languages
    "plaintext": false,
    "markdown": false,
    "yaml": false
  }
}

See the full configuration in docs/VSCODE_COPILOT_SETUP.md.