Add doc about Tuya's resolution_id

Author: romasku

README.md

@@ -689,6 +689,7 @@ Supports [Tuya IPC cameras](https://developer.tuya.com/en/docs/iot/webrtc?id=Kac
 - `client_secret`   Tuya Cloud Project Access Secret/Client Secret
 - `uid`             Tuya linked app UID (refer to the [Tuya Procedure step 3](https://developer.tuya.com/en/docs/iot/webrtc?id=Kacsd4x2hl0se#title-4-Prerequisites) for more info)
 - `device_id`       Tuya device ID (you can retrieve it from the Tuya Cloud Project Devices page)
+- `resolution_id`   Tuya Resoluion ID (either 0 (HD) or 1 (SD), not all devices support it), This parameter is optional
 
 URL should be `https://openapi.tuyaeu.com` or another one ([see Tuya docs](https://developer.tuya.com/en/docs/iot/api-request?id=Ka4a8uuo1j4t4#title-1-Endpoints)) depending on your region.
 
@@ -700,7 +701,7 @@ streams:
   webrtc-openipc: webrtc:ws://192.168.1.123/webrtc_ws#format=openipc#ice_servers=[{"urls":"stun:stun.kinesisvideo.eu-north-1.amazonaws.com:443"}]
   webrtc-wyze:    webrtc:http://192.168.1.123:5000/signaling/camera1?kvs#format=wyze
   webrtc-kinesis: webrtc:wss://...amazonaws.com/?...#format=kinesis#client_id=...#ice_servers=[{...},{...}]
-  webrtc-tuya:    webrtc:https://openapi.tuyaeu.com#format=tuya#client_id=...#client_secret=...#uid=...#device_id=...
+  webrtc-tuya:    webrtc:https://openapi.tuyaeu.com#format=tuya#client_id=...#client_secret=...#uid=...#device_id=...#resolution_id=0
 ```
 
 **PS.** For `kinesis` sources you can use [echo](#source-echo) to get connection params using `bash`/`python` or any other script language.

internal/webrtc/tuya/tuya.go

@@ -152,6 +152,7 @@ func TuyaClient(rawURL string, query url.Values) (core.Producer, error) {
 		return nil, err
 	}
 
+	// Set resolution via MQTT command if set
 	if query.Has("resolution_id") {
 		value, err := strconv.Atoi(query.Get("resolution_id"))
 		if err != nil {