move setup function to python

There are still back-calls to PHP for some of the sub-steps.
These needs some larger refactoring to be moved to Python.

nominatim/clicmd/__init__.py

@@ -2,6 +2,7 @@
 Subcommand definitions for the command-line tool.
 """
 
+from .setup import SetupAll
 from .replication import UpdateReplication
 from .api import APISearch, APIReverse, APILookup, APIDetails, APIStatus
 from .index import UpdateIndex