There should be extension commands to randomly spawn/delete pets

[sharktrexer]

Please describe your idea.
Two new commands for the extension that

1. Creates a random pet with a random selection from their specific color and name lists.
2. Deletes a random pet in the panel if applicable.

Describe how the idea would be helpful
This extension has a vast amount of pet options at this point and thus a new, fun way to interact with all the many variations of pets could be an interesting addition.

The 1st command would improve the overall sandbox feel of the extension and allow for users to see more of the different pet options that different people have contributed. The 2nd command helps the user quickly and easily make unpredictable changes to their panel environment.

With these commands users can easily change up their current pets and simulate a more dynamic environment at any moment, such as mixing up their pets every new coding session.

Additional context
I was too eager and already made a pull request containing these changes #623