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/testing/mock-data/remote-servers.ts

@@ -12,7 +12,7 @@ export const mockedRemoteServers = [
     foreignDataWrapperType: 'postgres_fdw',
     userMappingOptions: {
       __typename: 'UserMappingOptionsDTO',
-      username: 'twenty',
+      user: 'twenty',
     },
     updatedAt: '2024-04-30T13:41:25.858Z',
     schema: 'public',