[service-api] Add unified service API on `_cw` attribute
This will allow writting generic entity code that could run on both client and
repo side.
This addition have been discussed with Sylvain Sylvain Thenault.
[system]
db-driver = postgres
db-host = localhost
db-port = 5433
adapter = native
db-name = cw_fti_test
db-encoding = UTF-8
db-user = syt
db-password = syt
[admin]
login = admin
password = gingkow