Make setup ISO-only

Remove legacy online installer entrypoints, collapse migrations for 4.0, and move setup responsibilities into target-side system, hardware, and user commands.

install/user/first-run/gnome-theme.sh

@@ -0,0 +1,3 @@
+gsettings set org.gnome.desktop.interface gtk-theme "Adwaita-dark"
+gsettings set org.gnome.desktop.interface color-scheme "prefer-dark"
+gsettings set org.gnome.desktop.interface icon-theme "Yaru-blue"

install/user/first-run/gtk-primary-paste.sh

@@ -0,0 +1 @@
+gsettings set org.gnome.desktop.interface gtk-enable-primary-paste true

install/user/first-run/install-voxtype.hook

@@ -0,0 +1,12 @@
+#!/bin/bash
+
+set -e
+
+(
+  if [[ -n $(omarchy-notification-send -u critical -g  "Install Dictation with Voxtype" "Click to install voice dictation for Omarchy." -a) ]]; then
+    omarchy-launch-floating-terminal-with-presentation omarchy-voxtype-install
+  fi
+) >/dev/null 2>&1 &
+
+# Remove this hook after scheduling the background notification action.
+rm -f "$0"

install/user/first-run/welcome.sh

@@ -0,0 +1,5 @@
+(
+  if [[ -n $(omarchy-notification-send -u critical -g  "Learn Keybindings" "Super + K for cheatsheet.\nSuper + Space for application launcher.\nSuper + Alt + Space for Omarchy Menu." -a) ]]; then
+    omarchy-menu-keybindings
+  fi
+) >/dev/null 2>&1 &

install/user/first-run/wifi.sh

@@ -0,0 +1,22 @@
+notify_update() {
+  (
+    if [[ -n $(omarchy-notification-send -u critical -g  "Update System" "$1" -a) ]]; then
+      omarchy-launch-floating-terminal-with-presentation omarchy-update
+    fi
+  ) >/dev/null 2>&1 &
+}
+
+notify_wifi() {
+  (
+    if [[ -n $(omarchy-notification-send -u critical -g 󰖩 "Click to Setup Wi-Fi" -a) ]]; then
+      omarchy-shell omarchy.network toggle
+    fi
+  ) >/dev/null 2>&1 &
+}
+
+if ! ping -c3 -W1 1.1.1.1 >/dev/null 2>&1; then
+  notify_update "When you have internet, click to update the system."
+  notify_wifi
+else
+  notify_update "Click to update the system."
+fi