route: code layout clean up auth_sources route
test: route: add auth_sources test defined at r8162
test: route: add settings test defined at r8162
test: route: add workflows test defined at r8162
test: route: split repository route test
route: code layout clean up repository route
route: code layout clean up admin route
test: route: add admin tests defined at r8162
route: code layout clean up mail_handler route
test: route: add mail_handler test defined at r8162
