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

default/hypr/bindings/dictation.lua

@@ -0,0 +1,9 @@
+if o.shell_succeeds("omarchy-default-dictation") then
+  o.bind("SUPER + CTRL + X", "Toggle dictation", "omarchy-dictation toggle")
+  o.bind("F9", "Start dictation (push-to-talk)", "omarchy-dictation start")
+  o.bind("F9", "Stop dictation (push-to-talk)", "omarchy-dictation stop", { release = true })
+  -- A modifier's mask changes between its press and release. Match the keysym
+  -- independently of that mask; AltGr layouts use a different keysym.
+  o.bind("ALT + Alt_R", "Start dictation (push-to-talk)", "omarchy-dictation start", { ignore_mods = true })
+  o.bind("ALT + Alt_R", "Stop dictation (push-to-talk)", "omarchy-dictation stop", { release = true, ignore_mods = true })
+end