add swaymirror.bash for mirroring displays on Sway using wayvnc and Remmina

bash/swaymirror.bash

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+
+# As Sway doesn't support display mirroring, using VNC seems like the least
+# bad workaround that was suggested in the issue.
+# https://github.com/swaywm/sway/issues/1666
+
+set -x
+
+# -r mirrors cursor, eDP-1 is the internal display name on lumina to be mirrored
+wayvnc ::1 -r -o eDP-1&
+
+# So I won't forget it and think something broke
+notify-send "Remember to Mod-Shift-NUM to exit black screen"
+# So Remmina doesn't start too fast and fail to connect for it.
+sleep 5
+
+# remmina is the first wayland using VNC client I encountered. --display is Xorg
+# so it will need to be moved to proper workspace and fullscreened manually
+remmina --disable-toolbar --enable-fullscreen "vnc://[::1]"
+
+set +x