Extension - Fast number parse for char arrays and strings

[title]Fast number parse for char arrays and strings[/title]
With this function you can parse char arrays. For example, received byte/chars from a serial connection without the need of creating and manipulating string. This way you eliminate that the GC runs.

It’s works like old style char[] in C.

This way you can reuse a defined char array. No need to create immutable strings which is a resource waste.