Add new Citation Type to capture "Infra, at XYZ" citations

[flooie]

We just saw a citation like this today:

Government had conceded), and doing so is especially inappropriate when, as here, the issue is unnecessary to decide the case, see infra, at 694.

See https://www.courtlistener.com/opinion/145875/ashcroft-v-iqbal/#689

We need to understand what this means and figure out of this just a supra in other words, or if there's more complexity to capturing it.

[mlissner]

Oh, interesting, infra means the same document later on. So in the quote above, "infra at 694" means a reference to the same decision at pincite 694.

I guess we could handle these kind of like how we handle footnotes, but doesn't feel like a job for eyecite, and it certainly doesn't seem like it's worth much effort. It only appears to be in the corpus 11k times:

https://www.courtlistener.com/?type=o&q=%22infra%20at%22&type=o&order_by=score%20desc#

Shall we close this and move on?