feat(sso): introduce authentication with SAML

packages/backend/package.json

@@ -27,10 +27,12 @@
     "@casl/ability": "^6.5.0",
     "@graphql-tools/graphql-file-loader": "^7.3.4",
     "@graphql-tools/load": "^7.5.2",
+    "@node-saml/passport-saml": "^4.0.4",
     "@rudderstack/rudder-sdk-node": "^1.1.2",
     "@sentry/node": "^7.42.0",
     "@sentry/tracing": "^7.42.0",
     "@types/luxon": "^2.3.1",
+    "@types/passport": "^1.0.12",
     "@types/xmlrpc": "^1.3.7",
     "ajv-formats": "^2.1.1",
     "axios": "0.24.0",
@@ -63,6 +65,7 @@
     "nodemailer": "6.7.0",
     "oauth-1.0a": "^2.2.6",
     "objection": "^3.0.0",
+    "passport": "^0.6.0",
     "pg": "^8.7.1",
     "php-serialize": "^4.0.2",
     "stripe": "^11.13.0",