Add a list of our papers

[ayshih]

We should list all of our SunPy papers somewhere. This is not a duplicate of #339, which is about papers that use SunPy.

• https://ui.adsabs.harvard.edu/abs/2015CS%26D....8a4009S/abstract
• https://ui.adsabs.harvard.edu/#abs/2020JOSS....5.1832M/abstract
• https://ui.adsabs.harvard.edu/#abs/2020ApJ...890...68S/abstract
• https://ui.adsabs.harvard.edu/abs/2023FrASS..1076726B/abstract

[ayshih]

NDCube:

• https://ui.adsabs.harvard.edu/abs/2023JOSS....8.5296R/abstract
• https://ui.adsabs.harvard.edu/abs/2023ApJ...956...44R/abstract

[nabobalis]

Should package specific papers be in the docs for those packages?

[Cadair]

I feel like having a central location of all the "project" papers would be a good thing?