New installations don't need to migrate from what's already there

install/preflight/migrations.sh

@@ -0,0 +1,8 @@
+#!/bin/bash
+
+omarchy_migrations_state_path=~/.local/state/omarchy/migrations
+mkdir -p $omarchy_migrations_state_path
+
+for file in ~/.local/share/omarchy/migrations/*.sh; do
+  touch "$omarchy_migrations_state_path/$(basename "$file")"
+done