Add support for traffic management

[myoung34]

Currently go-unifi (and terraform downstream) cannot manage traffic management

Endpoint is api/site/default/trafficrules and an example GET

[
  {
    "_id": "6341da70ae89fe09e5458a22",
    "action": "BLOCK",
    "app_category_ids": [],
    "app_ids": [],
    "bandwidth_limit": {
      "download_limit_kbps": 1024,
      "enabled": false,
      "upload_limit_kbps": 1024
    },
    "description": "Traffic Rule",
    "domains": [
      {
        "domain": "somedomain.com",
        "port_ranges": [],
        "ports": []
      }
    ],
    "enabled": false,
    "ip_addresses": [],
    "ip_ranges": [],
    "matching_target": "DOMAIN",
    "network_ids": [],
    "regions": [],
    "schedule": {
      "date_end": "2022-10-15",
      "date_start": "2022-10-08",
      "mode": "ALWAYS",
      "repeat_on_days": [],
      "time_all_day": false,
      "time_range_end": "12:00",
      "time_range_start": "09:00"
    },
    "target_devices": [
      {
        "client_mac": "78:c8:81:cd:dd:6d",
        "type": "CLIENT"
      }
    ]
  }
]