Add kanshi config

Dynamically manages outputs based on profiles.

kanshi/config

@@ -0,0 +1,10 @@
+profile external-dell {
+	output eDP-1 disable
+    # Dell P2416D, 23.8 inches, 123.41 PPI (see https://www.sven.de/dpi/)
+    # "make model serial" from `swaymsg -t get_outputs`
+    output "Dell Inc. DELL P2416D 6RC2C54O0NWS" mode 2560x1440 position 0,0 scale 1.75
+}
+
+profile internal {
+	output eDP-1 enable mode 2560x1440 scale 1.75 position 0,0
+}