Include optics-core and optics in the package set

[Kleidukos]

@tomsmeding Hi! I'd like to be able to showcase stuff with optics-core and optics. Could they be added to the package set?

[tomsmeding]

I think the following list is the part of optics' transitive dependency set that's not in the exposed set yet:

optics
optics-core
optics-extra
optics-th
indexed-profunctors

I'm not too familiar with optics. Does it make sense to expose optics-extra and optics-th separately, or are all their modules re-exported by optics?

[tomsmeding]

Upon closer inspection, optics doesn't re-export some of the internal modules from optics-extra and optics-th, so I added them too. All of this should now be available for every GHC version currently on the playground.