Suggest the use of the flag --watch when the comands rit build or rit build formula are used

[leticiasilvazup]

What would you like to be added:

A tutorial tip immediatly when the command rit build or rit build formula are used.

Or a option imeadiatly after the rit build formula, asking the user if he wants to run the build using --watch to avoid having to run the command after every modification, and if the answer is yes, run it automaticly.

Something like this:

"Are you testing your formula? You can use the flag --watch to avoid using the rit build formula for every modification. Try it on another window."

Or:
Do you want to use the flag --watch?
yes
no

Why is this needed:

To improve usabillty for users that are creating and testing the formula