Added examples for servo library

[AbhishekGore]

Taking input for angles from the user via the serial monitor, I have used two different methods for executing it, one involves the use of parsInt() function and in another example, it uses toInt() function and in the third example none of the in-built function is used

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}