feat: add organisation sso portal (#1946)

Allow organisations to manage an SSO OIDC compliant portal. This method
is intended to streamline the onboarding process and paves the way to
allow organisations to manage their members in a more strict way.

packages/lib/utils/organisation-authentication-portal.ts

@@ -0,0 +1,13 @@
+import { NEXT_PUBLIC_WEBAPP_URL } from '../constants/app';
+
+export const formatOrganisationLoginUrl = (organisationUrl: string) => {
+  return NEXT_PUBLIC_WEBAPP_URL() + formatOrganisationLoginPath(organisationUrl);
+};
+
+export const formatOrganisationLoginPath = (organisationUrl: string) => {
+  return `/o/${organisationUrl}/signin`;
+};
+
+export const formatOrganisationCallbackUrl = (organisationUrl: string) => {
+  return `${NEXT_PUBLIC_WEBAPP_URL()}/api/auth/callback/oidc/org/${organisationUrl}`;
+};