add Faroro TD20 Pet Treat Camera support

[augs]

Adds support for the Faroro TD20 Pet Treat Camera.

This device was previsouly sold on Amazon at https://www.amazon.com/dp/B0C6JMWTYN

Local DPS discovery of my reference device returns:

[
 {"id": 103, "name": "basic_flip", "type": "Boolean", "format": "{}", "enumMap": {}},
 {"id": 108, "name": "basic_nightvision", "type": "Enum", "format": "{\"range\":[\"0\",\"1\",\"2\"]}", "enumMap": {}},
 {"id": 134, "name": "motion_switch", "type": "Boolean", "format": "{}", "enumMap": {}},
 {"id": 168, "name": "motion_area_switch", "type": "Boolean", "format": "{}", "enumMap": {}},
 {"id": 169, "name": "motion_area", "type": "String", "format": "{\"maxlen\":255}", "enumMap": {}}
]

Functionality not implemented

Camera audio and video is not implemented as it is not supported by tuya-local

Camera motion scheduling is also not exposed via any DPS that I can find so it is not implemented.

DPS #169 motion_area is only exposed as a text field. The device expects a JSON payload defining an overlay box. The values are most likely percentages of camera area. Below is an example for the entire area:
{"num":1,"region0":{"x":0,"y":0,"xlen":100,"ylen":100}}

DPS #212 logic is not implemented as it would require some custom parsing of the payload JSON. It triggers when motion is detected and an image is uploaded to a cloud bucket. Below is an example:

{"v":"4.0","bucket":"ty-us-storage$$","cmd":"ipc_motion","type":"image","with":"resource","alarm":true,"time":1766941681,"files":[["/######-##########-#####################/unify/###########.jpeg","#################"]]}

DPS #233 主动消息推送 or proactive push notifications does not appear to accept any value changes.

[make-all]

Top level name should be generic, as other brands are likely to be used for the same device in different markets.

[augs]

done, should I also rename the file?