Add a attribute for the maximum angle for a servo motor.

[Koepel]

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It was mentioned in the Discord channel that the servo motor can only do 0...180 degrees.

Could a attribute be added to change the maximum angle?

Well known webshops have often servo motors for special situations with other angles. I see them from as low as 0...90 degrees up to 0...360 degrees (not continuous). From what I read, the same pwm signal results into the full swing for that servo motor.