feat(auth): add WorkOS and Keycloak SSO providers (rebased) (#220)

Co-authored-by: Jason Woltje <jason@diversecanvas.com>
Co-committed-by: Jason Woltje <jason@diversecanvas.com>

apps/web/src/lib/sso.ts

@@ -0,0 +1,20 @@
+export type SsoProtocol = 'oidc' | 'saml';
+export type SsoLoginMode = 'oidc' | 'saml' | null;
+
+export interface SsoProviderDiscovery {
+  id: 'authentik' | 'workos' | 'keycloak';
+  name: string;
+  protocols: SsoProtocol[];
+  configured: boolean;
+  loginMode: SsoLoginMode;
+  callbackPath: string | null;
+  teamSync: {
+    enabled: boolean;
+    claim: string | null;
+  };
+  samlFallback: {
+    configured: boolean;
+    loginUrl: string | null;
+  };
+  warnings: string[];
+}