CLI: use alphabetical order for command listing in `help`

Change-Id: I7a52cc131f577499aaefcbaa9c124b293bfecee3
diff --git a/src/ast_commands.hpp b/src/ast_commands.hpp
index 397aeb8..ddaac35 100644
--- a/src/ast_commands.hpp
+++ b/src/ast_commands.hpp
@@ -164,7 +164,7 @@
 };
 
 struct help_;
-using CommandTypes = boost::mpl::vector<discard_, ls_, cd_, create_, delete_, set_, commit_, get_, describe_, help_>;
+using CommandTypes = boost::mpl::vector<cd_, commit_, create_, delete_, describe_, discard_, get_, help_, ls_, set_>;
 struct help_ : x3::position_tagged {
     static constexpr auto name = "help";
     static constexpr auto shortHelp = "help - Print help for commands.";