[PLAY-673] Loop through all kits

[markdoeswork]

What does this PR do? A clear and concise description with your runway ticket url.
https://nitro.powerhrg.com/runway/backlog_items/PLAY-673

Adds a test to make sure ClassName is the last class for each component

Originally tried to use front end testing to load each component and view the classname, but some components have required props to load

Then tried to load the Modules/Functions and read the const classes but because they are private variables they are not always exposed.

Ended up using ruby and a regular expression to just read the file and make sure that Classname was where it should be

Screenshots: Screenshots to visualize your addition/change

How to test? Steps to confirm the desired behavior:

1. Go to playbook/spec/pb_kits/playbook/all_kits_spec.rb
2. Run the test

Checklist:

• LABELS Add a label: enhancement, bug, improvement, new kit, deprecated, or breaking. See Changelog & Labels for details.
• DEPLOY I have added the milano label to show I'm ready for a review.
• TESTS I have added test coverage to my code.