Add selectable Voxtype and Superwhisper dictation (#14552)

* Add selectable dictation backends

* Move dictation migration after repository priority update

* Extract backend-specific dictation installers

* Keep dictation installer dispatcher executable

* Call dictation backend installers directly

* Drop legacy Superwhisper migration and runtime cleanup

* Separate dictation defaults from generic recording protocol

* Add backend-specific dictation removers

* Preserve existing Voxtype selection during upgrade

* Make dictation backend selection safe and retryable

* Show the dictation indicator only for selected Voxtype

* Allow switching away from stopped Superwhisper

* Remove the built-in bar dictation indicator

* Store default dictation selection under defaults

* Rename dictation backend selector to use

* Move dictation removers into their own menu category

migrations/1791479273.sh

@@ -0,0 +1,9 @@
+echo "Preserve Voxtype as the default for existing dictation users"
+
+backend_config="${XDG_CONFIG_HOME:-$HOME/.config}/omarchy/defaults/dictation"
+if [[ ! -e $backend_config ]] && omarchy-pkg-present voxtype-bin; then
+  mkdir -p "${backend_config%/*}"
+  temporary=$(mktemp "$backend_config.XXXXXX")
+  printf '%s\n' voxtype > "$temporary"
+  mv -f "$temporary" "$backend_config"
+fi