add iMac16,2 hyprland config and tmux.third config

configs/hyprland/iMac16,2/startup.conf

@@ -0,0 +1,10 @@
+exec-once=waybar
+exec-once=nm-applet --indicator & disown
+exec-once=/usr/lib/polkit-kde-authentication-agent-1
+exec-once = hyprpaper
+exec-once = hypridle
+exec-once = wl-clipboard # Needed for Neovim `Yank` to work
+exec-once = hyprpm reload -n # Reload plugins
+
+exec = brightnessctl s 75% # Screen brightness
+exec = brightnessctl --device=':white:kbd_backlight' set 0% # Keyboard backlight, start at off