docs/tutorial: Show how to launch the REPL
Post-installation step of the tutorial doesn't show how to actually
start the REPL.
`Sublime Text <https://packagecontrol.io/packages/EdgeDB>`_,
and `Vim <https://github.com/edgedb/edgedb-vim>`_.
+To begin, launch the EdgeDB CLI and connect to the default server instance:
+
+.. code-block:: bash
+
+ $ edgedb -Idefault
First step in a brand new project is to create the database for it:
