Add wan status

Tested with CGA6444VF Firmware: 19.3B57-1.0.41

api/v1/wan

{
	"error": "ok",
	"message": "all values retrieved",
	"data": {
		"ipv4": "203.0.113.11",
		"mac_address": "00-00-5e-00-53-00",
		"duration": "424",
		"durationIpv6": "0",
		"expires": "4976",
		"ipv4_dns": "192.0.2.11.22,198.51.100.0.33,",
		"IPAddress_v6": [
			"2001:DB8::2:db8",
			"2001:DB8::3:db8"
		],
		"DNSTblRT": [
			"2001:DB8::4:1101",
			"2001:DB8::5:1101"
		]
	}
}