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

bin/omarchy

@@ -46,6 +46,7 @@ GROUP_DESCRIPTIONS[finalize]="Finalize user setup"
 GROUP_DESCRIPTIONS[default]="Default application selection"
 GROUP_DESCRIPTIONS[dev]="Omarchy development tools"
 GROUP_DESCRIPTIONS[disk]="Disk performance helpers"
+GROUP_DESCRIPTIONS[dictation]="Dictation recording"
 GROUP_DESCRIPTIONS[display]="Display and text scaling"
 GROUP_DESCRIPTIONS[dns]="DNS resolver configuration"
 GROUP_DESCRIPTIONS[drive]="Drive selection and encryption"