43 add billing portal link (#4318)

* Add create billing portal session endpoint

* Rename checkout to checkoutSession

* Add billig portal query in twenty-front

* Add billing menu item

* WIP: add menu page

* Code review returns

* Rename request files

* Unwip: add menu page

* Add billing cover image

* Fix icon imports

* Rename parameter

* Add feature flag soon pill

packages/twenty-front/src/modules/billing/graphql/checkoutSession.ts

@@ -0,0 +1,15 @@
+import { gql } from '@apollo/client';
+
+export const CHECKOUT_SESSION = gql`
+  mutation CheckoutSession(
+    $recurringInterval: String!
+    $successUrlPath: String
+  ) {
+    checkoutSession(
+      recurringInterval: $recurringInterval
+      successUrlPath: $successUrlPath
+    ) {
+      url
+    }
+  }
+`;