feat(ember-cli): add completions for ember-cli (#5916)

Closes #5916

plugins/ember-cli/ember-cli.plugin.zsh

@@ -1,17 +1,12 @@
-# Ember CLI
-# Visit https://www.ember-cli.com/ to view user guide
-
-alias es='ember serve'
 alias ea='ember addon'
 alias eb='ember build'
 alias ed='ember destroy'
 alias eg='ember generate'
 alias eh='ember help'
-alias ein='ember init'
 alias ei='ember install'
+alias ein='ember init'
+alias es='ember serve'
 alias et='ember test'
 alias ets='ember test --serve'
 alias eu='ember update'
-
-# version
 alias ev='ember version'