New Feature: Multi-threaded / Multi-process Tests while using Dashboard Mode

[mdmintz]

New Feature: Multi-threaded / Multi-process Tests while using Dashboard Mode.

Currently, you can either run tests with multi-processing (eg. -n=4), or you can use Dashboard Mode (--dashboard) to display the Dashboard while running tests.

It's time to add the ability to combine the two options safely! (This requires a very precise implementation of thread-locking to make sure that different processes don't conflict with each other when writing to the Dashboard.)

[mdmintz]

Resolved by https://github.com/seleniumbase/SeleniumBase/releases/tag/v1.61.0