feat(auth): [PM-8978] migrate SSO connector to Tailwind

- Convert Bootstrap styles to Tailwind
- Remove deprecated sso.scss
- Add test coverage for SSO connector

[PM-8978]

apps/web/webpack.config.js

@@ -122,7 +122,7 @@ const plugins = [
   new HtmlWebpackPlugin({
     template: "./src/connectors/sso.html",
     filename: "sso-connector.html",
-    chunks: ["connectors/sso"],
+    chunks: ["connectors/sso", "styles"],
   }),
   new HtmlWebpackPlugin({
     template: "./src/connectors/redirect.html",