Update Yarn plugin alias (#6246)

plugins/yarn/yarn.plugin.zsh

-alias yi="yarn install"
+# Alias sorted alphabetically
+
+alias y="yarn "
+alias ya="yarn add"
+alias ycc="yarn cache clean"
+alias yh="yarn help"
+alias yo="yarn outdated"
+alias yui="yarn upgrade-interactive"
 
 _yarn ()
 {