feat: introduce authentication page (#1241)

* feat: introduce authentication page

* feat: update page width

* fix(saml): cover non-existing role mapping on onboarding

---------

Co-authored-by: Ali BARIN <ali.barin53@gmail.com>

packages/web/src/graphql/queries/get-saml-auth-provider.ts

@@ -0,0 +1,19 @@
+import { gql } from '@apollo/client';
+
+export const GET_SAML_AUTH_PROVIDER = gql`
+  query GetSamlAuthProvider {
+    getSamlAuthProvider {
+      name
+      certificate
+      signatureAlgorithm
+      issuer
+      entryPoint
+      firstnameAttributeName
+      surnameAttributeName
+      emailAttributeName
+      roleAttributeName
+      active
+      defaultRoleId
+    }
+  }
+`;