Add language CLIPS, add structures Facts and Rules to CLIPS 6.4.1

[mrryanjohnston]

What GitHub issue does this PR apply to?

Resolves #743

What changed and why?

I added the CLIPS programming language, as well as 2 structures and 4 concepts.

Checklist

• [x] I claimed any associated issue(s) and they are not someone else's
• [x] I have looked at documentation to ensure I made any revisions correctly
• [ ] I tested my changes locally to ensure they work
• [ ] For language files, I have validated the edited files are valid JSON and data shows up correctly
• [ ] For website code edits, I have added or edited any appropriate unit tests for my changes

Any additional comments or things to be aware of while reviewing?

Is there an automated way to test my changes?