irl-ops

Also fixed a small spelling error in the readme.

The original analog write function limits you to 1000 steps of resolution which while easy to use and understand, was not enough for some applications.

Rename utils.h file to prevent conflicts with other libraries

1

### What happened? I am using [another library](https://github.com/jgromes/RadioLib/blob/master/src/utils/Utils.h) that also contains a `utils/utils.h` file. The compiler just uses whichever one was included first, this is obviously problematic. With "utils" being...