feat: replace swaylock with gtklock

* Update package list with gtklock and userinfo, powerbar modules;
* Add gtklock config.ini, style.css, lockscreen wallpaper, default .face file (EOS logo);
* Remove swaylock configs;
* Update lock screen binding;
* Move idle config to autostart_applications.

.config/gtklock/config.ini

@@ -0,0 +1,19 @@
+[main]
+gtk-theme=Arc-Dark
+time-format=%l:%M %p
+start-hidden=1
+modules=userinfo-module;powerbar-module
+
+[userinfo]
+round-image=true
+horizontal-layout=false
+under-clock=true
+
+[powerbar]
+show-labels=true
+linked-buttons=true
+reboot-command=systemctl reboot
+poweroff-command=systemctl -i poweroff
+suspend-command=systemctl suspend
+userswitch-command=
+logout-command=swaymsg exit