Draw intermediary nodes matrix

[gotdairyya]

This table should show the middle paths of a connectivity query.

To do:

• add labels for rows
• add symbols above columns to indicate path position

[gotdairyya]

@JackWilb this is a super simple implementation of the intermediary node view

I've added issues for the next steps:
#303
#304

[JackWilb]

It seems like if you run a 2 hop query and then a 3 hop, it doesn't update properly. Maybe that's a more general problem here, that it's not reactive to new update. We'd need to explore that a bit more

Other than that, I've cleaned up some type issues, etc. I also have a couple of questions for you

[JackWilb]

There's a bunch of extra space that is added if this div is present. You could also open an issue to address the reactivity of the component since it doesn't seem to update if the path length changes or a query is re-run

With div:

Without div:

[gotdairyya]

Ok so aside from the matrix not updating correctly (pushed to issue #311) I think I have addressed all of the issues
Let me know if I should do anything else before merge?