[feature request] Add `watched_plate` config arg

[robmarkcole]

Add watched_plate config arg which is a list of plates to watch for, with an entity created for each where the state is the time of the last detection of the plate. If a plate with the same number is matched, or similar by at least 4 characters, update this entity.

[alexandrechoske]

Hi @robmarkcole , how can I config this to detect cars? I didnt figure it out.

Thanks!

[robmarkcole]

@alexandrechoske please ask on the forums for this kind of general advice. Thanks

[jazzmonger]

Yes- that would fit the bill perfectly. If you make it generic, we can use it across other integrations that produce a 'result' that will be contained in a list of user provided results.