Add Monologue as a default app (#13449)

Monologue is Omarchy's own webcam recorder: pick a camera and microphone
once, press Space to record, and stop straight into a built-in editor
to split, trim and remove clips before saving an MP4.

Ship it in the base packages alongside Omacut, include it in the
preinstall restore/remove lists, and describe it in the manual. A
migration installs it on existing machines unless the user removed the
preinstalls.

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

migrations/1790539857.sh

@@ -0,0 +1,5 @@
+echo "Install Monologue, the webcam recorder"
+
+if [[ ! -f $HOME/.local/state/omarchy/preinstalls-removed ]]; then
+  omarchy-pkg-add monologue
+fi