## Is your feature request related to a problem?

I'm browsing user data in posthog and I'd like to figure out whether a user has correctly been added to a cohort

## Describe the solution you'd like

Show tab "cohorts" next to "properties" on people page.

## Describe alternatives you've considered

Going through all cohorts.

## Additional context



#### *Thank you* for your feature request – we love each and every one!

posthog/api/test/test_person.py
person1 = person_factory(team=self.team, properties={"$browser": "whatever", "$os": "Mac OS X"})
            person2 = person_factory(team=self.team, properties={"random_prop": "asdf"})
            person_factory(team=self.team, properties={"random_prop": "asdf"})
            response = self.client.get("/api/person/?id={},{}".format(person1.id, person2.id))
            response_uuid = self.client.get("/api/person/?uuid={},{}".format(person1.uuid, person2.uuid))
            self.assertEqual(response.status_code, 200)
            self.assertEqual(response.json(), response_uuid.json())
            self.assertEqual(len(response.json()["results"]), 2)
        def test_merge_people(self) -> None:
            
            person3 = person_factory(team=self.team, distinct_ids=["3"], properties={"oh": "hello"})
            person1 = person_factory(
                team=self.team, distinct_ids=["1"], properties={"$browser": "whatever", "$os": "Mac OS X"}
            )
            person2 = person_factory(team=self.team, distinct_ids=["2"], properties={"random_prop": "asdf"})
            response = self.client.post(
                "/api/person/%s/merge/" % person1.pk,
                data=json.dumps({"ids": [person2.pk, person3.pk]}),
                content_type="application/json",
            )
            self.assertEqual(response.status_code, 201)
            self.assertEqual(response.json()["created_at"].replace("Z", "+00:00"), person3.created_at.isoformat())
            self.assertEqual(response.json()["distinct_ids"], ["3", "1", "2"])
            person = get_people()
            self.assertEqual(len(person), 1)
            self.assertEqual(
                person[0].properties, {"$browser": "whatever", "$os": "Mac OS X", "random_prop": "asdf", "oh": "hello"}
            )
            self.assertEqual(person[0].created_at, person3.created_at)
        def test_return_non_anonymous_name(self) -> None: