[windows service] Copied the 3 lines from etwist/twctl into etwist/service in order to also clean the cache in Windows service mode.
Could be factorised with etwist/server.run
Add some entities
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As manager, you can access to entity creation forms by using the `site management`_ page.
.. _`site management`: manage
As regular user, the index page or the action box may propose some links to create entities according to the context.