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/greetd/templates/config.toml.j2

@@ -4,5 +4,5 @@ vt = 1
 
 # Default session: tuigreet greeter
 [default_session]
-command = "tuigreet --time --remember --asterisks --cmd {{ hyprland_cmd | default('Hyprland') }}"
+command = "tuigreet --time --remember --asterisks --cmd {{ hyprland_cmd | default('start-hyprland') }}"
 user = "greeter"