Build stripe integration on backend side (#5246)

Adding stripe integration by making the server logic independent of the
input fields:
- query factories (remote server, foreign data wrapper, foreign table)
to loop on fields and values without hardcoding the names of the fields
- adding stripe input and type
- add the logic to handle static schema. Simply creating a big object to
store into the server

Additional work:
- rename username field to user. This is the input intended for postgres
user mapping and we now need a matching by name

---------

Co-authored-by: Thomas Trompette <thomast@twenty.com>

packages/twenty-front/src/pages/settings/integrations/SettingsIntegrationNewDatabaseConnection.tsx

@@ -41,7 +41,7 @@ const createRemoteServerInputSchema = newConnectionSchema
     },
     userMappingOptions: {
       password: values.password,
-      username: values.username,
+      user: values.user,
     },
     schema: values.schema,
   }));