fix file architecture (#18)

Author: rustagir

source/fundamentals/run-command.txt

@@ -121,7 +121,7 @@ the ``explain`` command for a ``count`` operation on the ``flowers``
 collection of the ``plants`` database. The ``explain`` command runs in the
 ``"queryPlanner"`` verbosity mode:
 
-.. literalinclude:: /code-snippets/crud/run-command.rs
+.. literalinclude:: /includes/fundamentals/code-snippets/run-command.rs
    :language: rust
    :dedent:
    :start-after: start-runcommand