Add "Find groups from user" recipe

[schloerke]

Docs issue: https://github.com/rstudio/connect/issues/28176

Proposal that can be done today:

user = client.users.get("USER_GUID_HERE")
user_guid = user["guid"]

user_groups = user.groups.find()
# For every group
for group in client.groups.find():
    # Get group members
    group_guid = group["guid"]
    response = client.get("v1/groups/{group_guid}/members")
    members_raw = response.json()
    # For each member in the group
    for member_raw in members_raw:
        if member_raw["guid"] == user_guid:
            user_groups.append(group)
            break
user_groups

Proposal if Group.members is added:

## By implementing `Group.members` property...
for group in client.groups.find():
    group_members: list[User] = group.members.find()
    for group_member in group_members:
        if group_member['guid'] == user_guid:
            user_groups.append(group)
            break

Proposal if User.groups property and Group.members property are added

## By implementing `User.groups` property...
user_groups = user.groups.find()

# ...where
@property
def user_groups(self) -> UserGroups:
    ...

class UserGroups(Resource):

    def find() -> list[User]:
        user_groups: list[Group] = []
    
        for group in self.params.client.groups.find():
            group_members = group.members.find()
            for group_member in group_members:
                if group_member['guid'] == user_guid:
                    user_groups.append(group)
                    break

        return user_groups

[schloerke]

Final recipe:

Retrieve the groups to which the user belongs:

user = client.users.get("USER_GUID_HERE")
groups = user.groups.find()