feat: uwsm integration and hyprland worktime saver keybinds

- Replace SDDM with greetd+tuigreet (VT1) using uwsm-managed Hyprland
- Remove legacy exec-once from hyprland.conf
- Create 6 systemd user services: hyprpaper, waybar, dunst, hypridle,
  hyprlauncher, cliphist (all WantedBy=graphical-session.target)
- Add worktime saver keybinds: fullscreen, float, cycle windows,
  scratchpad, reload config, browser, keybind menu
- Home row navigation: HJKL for focus, move, resize (SUPER+ALT)
- Replace wofi with hyprlauncher (first-party, uwsm app prefix)
- Add hyprlauncher config with finders: desktop, math, unicode, font
- New ansible role templates: systemd/user services
- Documentation: hyprland-uwsm.md, cheatsheet.txt

KDE Wallet -> Bitwarden migration deferred (extract script prepared)

ansible/roles/hyprland/templates/systemd/hypridle.j2

@@ -0,0 +1,13 @@
+[Unit]
+Description=Hyprland idle daemon
+PartOf=graphical-session.target
+After=graphical-session.target
+
+[Service]
+Type=simple
+ExecStart=/usr/bin/hypridle
+Restart=on-failure
+RestartSec=3
+
+[Install]
+WantedBy=graphical-session.target