feat(hyprland): generate Lua monitor config instead of hyprlang

Write hl.monitor({...}) calls to ~/.config/hypr/monitors.lua (loaded via
require("monitors") in hyprland.lua) instead of monitor= lines in
monitors.conf. Prepare now strips hl.monitor lines with disabled = true,
and generateConf omits mode/position so Hyprland uses its defaults.
Update README and example config to match.

monitor-lets-go.example.yaml

@@ -18,10 +18,10 @@ restore_on_exit: true
 # Backend-specific options. Keys depend on the selected backend.
 # Hyprland supports:
 #   output_path — path to the generated monitor config file
-#                 (default: ~/.config/hypr/monitors.conf)
+#                 (default: ~/.config/hypr/monitors.lua)
 # Sway supports no backend-specific options (uses swaymsg commands directly).
 # backend_config:
-#   output_path: ~/.config/hypr/custom-monitors.conf
+#   output_path: ~/.config/hypr/custom-monitors.lua
 
 # External monitors that trigger docked mode.
 #   Plain name: matches the connector name (e.g. DP-1, HDMI-A-1).