Add an official gh.io shortlink for uninstall.sh

[tuanductran]

Describe the feature or problem you'd like to solve

There is now an uninstall.sh script for curl/wget installs, but there is no matching official shortlink like gh.io/copilot-install. This makes uninstall instructions less consistent and harder to document as a stable one-line command.

Proposed solution

Please create and maintain an official redirect such as https://gh.io/copilot-uninstall that points to the repository's uninstall.sh script. This would make the install and uninstall flows symmetrical and easier to document.

Example prompts or workflows

• Install with curl -fsSL https://gh.io/copilot-install | bash
• Uninstall later with curl -fsSL https://gh.io/copilot-uninstall | bash
• Use matching shortlinks in README, support replies, and release notes

Additional context

Adding uninstall.sh to the repository creates a raw GitHub URL, but it does not automatically create a gh.io shortlink. That redirect appears to require separate configuration outside the repository.