Add basic type store

[wizard7377]

This PR is a fork of #7634, which is currently inactive, this is merely building upon it, the original list these unfinished tasks

Automatically compactify redirects
Test store invariants
Unify simple types

[github-actions]

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[lukewilliamboswell]

I believe this has been overtaken and the type store is now implemented in main. Thank you for your efforts on this @wizard7377 and @agu-z

[wizard7377]

Sorry, I know I'm scatterbrained as hell and I completely forgot that this existed