👀 Open local pods options

[swiftyfinch]

In this request, I opened include and focus options of Cache command.
These options were added a month ago and finally, look stable enough.

Build local pods

You can include some local pods to cache:

rugby --include MyLocalPods1 MyLocalPods2

If you want to focus on some local pods and cache all others:

rugby --focus MyFocusedPod1 MyFocusedPod2

If you want to cache all local pods (Maybe someday there will be another solution):

rugby --focus ""

Checklist

• I've added at least one test that validates that my change is working, if appropriate
• I've followed the code style of the rest of the project
• I've read the Contribution Guidelines
• I've updated the documentation if necessary