Finalize jwt integration

[killua-eu]

• [x] rework auth->check()
• [x] rename auth->response() - it just fetches user data from db
• [x] look at view->getEnvironment()->addGlobal('session') and 'auth' usage in twig views
• [x] review other environmental globals
• [x] add a /api/core/jwt_refresh route which will refresh bearer and cookie
• [x] autorefresh cookie in authorizationmilldlwware.
• [x] kill $_SESSION['core_user_id'] usage (replace with auth->ses_check and jwt_check)