Add personal taskwarrior theme

This theme focuses more on hues than saturation. Aside from that it's
not very special versus the stock themes.

Also add an alias for taskwarrior-tui because it's sometimes useful.

.zshrc

@@ -35,6 +35,7 @@ SAVEHIST=10000
 setopt appendhistory
 
 alias ct="clear && task"
+alias tt="taskwarrior-tui"
 alias ls='ls --color=auto'
 alias grep='grep -EIs --color=auto --exclude-dir=.git'
 alias diff='diff --color=auto'