Adds emoji font and function to test emoji support

In my quest to learn more about terminals, I added a function to output ten
emojis. Technically this tests the same thing as test_unicode.

Unfortunately I couldn't get `st` to output any colored emojis. This is a bit of
a buzzkill for my grand plans to create a terminal-based chat client that
supports emojis.

configs/shared/zsh/variables.zsh

@@ -40,6 +40,15 @@ bright_magenta='\u001b[35;1m'
 bright_cyan='\u001b[36;1m'
 bright_white='\u001b[37;1m'
 
+# some of my favorite emojis as unicode
+facepalm='\U1F926'
+eyeroll='\U1F644'
+sheesh='\U1F62C'
+see_no_evil='\U1F648'
+blush='\U1F60A'
+wink='\U1F609'
+laugh='\U1F923'
+
 # commonly used config files
 v="$HOME/.config/nvim/init.vim"
 e="$HOME/.emacs.d/init.el"