Add emotty plugin

which displays an emoji for the current $TTY.

plugins/emotty/emotty_emoji_set.zsh

@@ -0,0 +1,24 @@
+#!/usr/bin/env zsh
+# vim:ft=zsh ts=2 sw=2 sts=2
+
+_emotty_sets[emoji]="
+  crystal_ball
+  ghost
+  jack_o_lantern
+  see_no_evil_monkey
+  hear_no_evil_monkey
+  speak_no_evil_monkey
+  smiling_cat_face_with_open_mouth
+  extraterrestrial_alien
+  rocket
+  billiards
+  bomb
+  pill
+  japanese_symbol_for_beginner
+  direct_hit
+  cyclone
+  diamond_shape_with_a_dot_inside
+  sparkle
+  eight_spoked_asterisk
+  eight_pointed_black_star
+  "