Integrate `gh copilot alias`

[wasertech]

Copilot added a shell-specific aliases generator function.

❯ gh copilot alias --help
Generate optional shell-specific aliases and functions for invoking gh copilot commands.

These aliases and functions are not required to use gh copilot, but they can be useful for convenience as they require fewer keystrokes and aid in executing suggested commands:

- `ghce`: wraps `gh copilot explain`
- `ghcs`: wraps `gh copilot suggest`, adding support for executing suggestions

Usage:
  copilot alias <shell> [flags]

Examples:

# Add aliases to Bash configuration
$ echo 'eval "$(gh copilot alias -- bash)"' >> ~/.bashrc

# Add aliases to PowerShell profile
$ $GH_COPILOT_PROFILE = Join-Path -Path $(Split-Path -Path $PROFILE -Parent) -ChildPath "gh-copilot.ps1"
$ gh copilot alias -- pwsh | Out-File ( New-Item -Path $GH_COPILOT_PROFILE -Force )
$ echo ". `"$GH_COPILOT_PROFILE`"" >> $PROFILE

# Add aliases to Zsh configuration
$ echo 'eval "$(gh copilot alias -- zsh)"' >> ~/.zshrc


Flags:
  -h, --help   help for alias

Global Flags:
      --hostname string   The GitHub host to use for authentication

Could be added into CodePilot first initialization.