feat: SAML authentication controllers [CW-2958] (#12319)

Gemfile.lock

@@ -589,8 +589,9 @@ GEM
     oj (3.16.10)
       bigdecimal (>= 3.0)
       ostruct (>= 0.2)
-    omniauth (2.1.2)
+    omniauth (2.1.3)
       hashie (>= 3.4.6)
+      logger
       rack (>= 2.2.3)
       rack-protection
     omniauth-google-oauth2 (1.1.3)
@@ -604,6 +605,9 @@ GEM
     omniauth-rails_csrf_protection (1.0.2)
       actionpack (>= 4.2)
       omniauth (~> 2.0)
+    omniauth-saml (2.2.4)
+      omniauth (~> 2.1)
+      ruby-saml (~> 1.18)
     opensearch-ruby (3.4.0)
       faraday (>= 1.0, < 3)
       multi_json (>= 1.0)
@@ -773,6 +777,9 @@ GEM
       faraday (>= 1)
       faraday-multipart (>= 1)
     ruby-progressbar (1.13.0)
+    ruby-saml (1.18.1)
+      nokogiri (>= 1.13.10)
+      rexml
     ruby-vips (2.1.4)
       ffi (~> 1.12)
     ruby2_keywords (0.0.5)
@@ -1047,6 +1054,7 @@ DEPENDENCIES
   omniauth-google-oauth2 (>= 1.1.3)
   omniauth-oauth2
   omniauth-rails_csrf_protection (~> 1.0, >= 1.0.2)
+  omniauth-saml
   opensearch-ruby
   pg
   pg_search