include the doc strings of .=, ., ->, :: into the docs

[nsajko]

No description provided.

[nsajko]

Looking at the documentation PDF produced by CI, all four entries are successfully included into the Keywords subsection. Follow up PRs will add some cross-references.

[Seelengrab]

If this fixes #36290, it'd be good to link the two here :)

[nsajko]

This PR includes the doc string for :: into the docs, but I don't know if that will make the search functionality be able to find ::. I guess we'll find out when this is merged.

[Seelengrab]

Good point - I'm subscribed to this PR, so I'll check once it's merged. If it's fixed, I'll close #36290 manually.

[nsajko]

ping

[nsajko]

ping

[Seelengrab]

It took a while until I remembered this, but it seems like this PR didn't fix :: being unfindable in the docs.

[nsajko]

Well the doc string is here: https://docs.julialang.org/en/v1.12-dev/base/base/#::

[Seelengrab]

Yes, it's probably some issue with the filtering happening in JS... Not sure how much we can do about it, though I think there is an issue in Documenter.jl about this too.