[doc/book] add RQL use cases with search/card/python/javascript
Related to https://www.cubicweb.org/ticket/3899077
change_attribute_type('CWUser', 'last_login_time', 'TZDatetime')
change_attribute_type('CWSource', 'latest_retrieval', 'TZDatetime')
drop_attribute('CWSource', 'synchronizing')
add_attribute('CWSource', 'in_synchronization')