Add Link Lists

[zicklag]

Right now we have the backend implemented for user lists, which are like link lists, but we don't have a UI for it.

There is more discussion on links in https://github.com/commune-os/weird/discussions/64. I haven't fully digested the technical implications. We may want to wait on link lists in the profiles until we nail down a broader concept of how we want to approach links in general from a technical perspective.