Lucas/t 231 timebox i can create a company at the same time im creating (#140)

This PR is a bit messy:

adding graphql schema
adding create company creation on company select on People page
some frontend refactoring to be continued

---------

Co-authored-by: Charles Bochet <charles@twenty.com>

front/src/services/api/people/update.ts

@@ -99,6 +99,41 @@ export async function updatePerson(
   const result = await apiClient.mutate({
     mutation: UPDATE_PERSON,
     variables: mapToGqlPerson(person),
+
+    // TODO: use a mapper?
+    optimisticResponse: {
+      __typename: 'people' as const,
+      id: person.id,
+      update_people: {
+        returning: {
+          id: person.id,
+          city: 'TEST',
+          company: {
+            domain_name: person.company?.domainName,
+            name: person.company?.name,
+            id: person.company?.id,
+          },
+          email: person.email,
+          firstname: person.firstname,
+          lastname: person.lastname,
+          phone: person.phone,
+          created_at: person.creationDate,
+
+          //   city
+          // company {
+          //   domain_name
+          //   name
+          //   id
+          // }
+          // email
+          // firstname
+          // id
+          // lastname
+          // phone
+          // created_at
+        },
+      },
+    },
   });
   return result;
 }