redirect to oidc provider if configured correctly (#2805)

Co-authored-by: konrad <k@knt.li>
Reviewed-on: https://kolaente.dev/vikunja/frontend/pulls/2805
Reviewed-by: konrad <k@knt.li>
Co-authored-by: viehlieb <pf@pragma-shift.net>
Co-committed-by: viehlieb <pf@pragma-shift.net>

src/types/IProvider.ts

@@ -3,4 +3,5 @@ export interface IProvider {
 	key: string;
 	authUrl: string;
 	clientId: string;
+	logoutUrl: string;
 }