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>

test/shell.d/preinstalls-test.sh

@@ -65,7 +65,7 @@ for package in "${restored[@]}"; do
 done
 pass "every preinstall is shipped in omarchy-base.packages"
 
-for package in omacut omacalc omawrite; do
+for package in omacut monologue omacalc omawrite; do
   printf '%s\n' "${restored[@]}" | grep -qxF "$package" ||
     fail "preinstalls cover the Omacom apps" "$package is missing"
 done