Add emacs support, as per user requests. :) (#1633)

Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>
Co-authored-by: N. Taylor Mullen <ntaylormullen@google.com>
Co-authored-by: Jacob Richman <jacob314@gmail.com>
Co-authored-by: matt korwel <matt.korwel@gmail.com>
Co-authored-by: matt korwel <mattkorwel@google.com>

packages/cli/src/ui/editors/editorSettingsManager.ts

@@ -23,6 +23,7 @@ export const EDITOR_DISPLAY_NAMES: Record<EditorType, string> = {
   windsurf: 'Windsurf',
   cursor: 'Cursor',
   vim: 'Vim',
+  emacs: 'Emacs',
   neovim: 'Neovim',
 };