Provide a list of papers that make use of sunpy

[ehsteve]

Description

It would be useful to provide a list of papers that make use of sunpy for their analysis so that we can point people to them and to highlight what sunpy has been used for.

It may be as easy to provide a link to the papers that have cited the sunpy paper which can be found here.

We could also maintain the list ourselves and potentially provide some added value by categorizing the papers for example. A bot could update the list automatically and people could add papers manually if they found a paper that forgot to cite the sunpy paper.

[wtbarnes]

I would suggest using this to do the automatic scraping (i.e. find papers that cite the v1.0 and/or zenodo releases) and then also allow for adding papers manually to that list (in case there are some that are missed by the automatic scraping). Presumably this could just be added as a step when building the website?