[FEATURE REQUEST] Make clear a cli flag and implement c command to toggle clearing console on/off.

[callmiy]

Thanks @randycoulman , this project continues to be a life saver.

I wish to have the ability to toggle clearing console on and off (just like file-watching).

I already prepared an implementation which I can turn into a PR if you agree to provide this feature.

In my implementation, clear will no longer be a compile time config. User will be able to pass --clear as cli flag and use c command to toggle clearing console off/on. This to me is the simpler approach (as it mirrors the implementation of file-watching).

Another approach is to retain the clear compile time config and implement this new feature on top.