FEAT #19887 TIME 15:00 Implementation of the cas connection

lang/fr.json

...app/configuration/controllers/ConfigurationController.php

src/core/controllers/AuthenticationController.php

...tend/app/administration/connection/cas/cas.component.html

...tend/app/administration/connection/cas/cas.component.scss

...ontend/app/administration/connection/cas/cas.component.ts

...end/app/administration/connection/connection.component.ts

src/frontend/app/app-routing.module.ts

src/frontend/app/app.component.ts

src/frontend/app/app.module.ts

src/frontend/app/login/login.component.html

src/frontend/app/login/login.component.ts

src/frontend/app/service/auth.guard.ts

src/frontend/app/service/auth.service.ts