Document formatter-specific Format Document keybindings

[Copilot]

Users with multiple formatters lacked documentation for invoking a specific nondefault formatter directly from a keyboard shortcut.

• Keybinding example

  • Documents editor.action.formatDocument.multiple with a formatter extension ID:

    {
      "command": "editor.action.formatDocument.multiple",
      "args": {
        "formatter": "publisher.extension-id"
      }
    }

• Command behavior

  • Distinguishes direct formatter invocation from configuring the default formatter or opening the formatter picker.
  • Covers case-insensitive matching and unavailable formatters.

• Fixes Document formatter-specific Format Document keybindings #10200