Device config for wifi refrigerator thermometer (#4705)
* Device config for wifi refrigerator thermometer
* Fix units per schema
* Fix names
* Review feedback
* feat (chtoocy_mc82_thermometer): add branding
To avoid the misunderstanding that this config is supposed to be generic, add branding in filename (though it may match other devices)
Add manufacturer from Amazon page. Another search result is for Jinghe MC92, which may be the original manufacturer, but cosmetically it looks different and has humidity display in photos, so maybe not the same device.
PR #4705
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Co-authored-by: Jason Rumney <make-all@users.noreply.github.com>