Install Hype, the Markdown presentation app, by default (#13455)

Hype joins Omacut, Monologue, Omacalc and Omawrite as an Omacom app in
the base install and the preinstall set, so Remove and Install
Preinstalls cover it too. A migration installs it on existing machines,
unless their owner has removed the preinstalls, and the GUIs chapter of
the manual introduces it.

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

migrations/1790542069.sh

@@ -0,0 +1,5 @@
+echo "Install Hype, the Markdown presentation app"
+
+if [[ ! -f $HOME/.local/state/omarchy/preinstalls-removed ]]; then
+  omarchy-pkg-add hype
+fi