Document At/Index

[christianbradley]

📖 Documentation

There is no documentation whatsoever for At or Index (atRecord, atSet etc). It would be helpful to even have some basic docs at the class/function level, if not in markdown.

[grzegorz-bielski]

In addition, maybe we can re-export those data types from the main index.ts?

Currently, you have to import them like this:

import { atRecord } from "monocle-ts/es6/At/Record";