Create full summary page for NSF POSE

[Nolski]

This is kind of a test, I will be using this same format for the other two NSF proposals as well so let me know if you think any information is missing and I can amend the other two as well.

[Nolski]

@RichardLitt I went ahead and added detail pages for both the Safe-OSE and GEO-OSE detail pages to this PR.

[RichardLitt]

I'm not sure the links as headers worked as intended. Is this what you wanted?

I think the mix of links here is confusing, too - NSF works, but not the subsidiary ones. Perhaps we should mark links if they are external?

Otherwise, looks OK, I think. This needs to be added to the TOC Tree. Can you do that?

[Nolski]

@RichardLitt Have a peek at these updates. I updated the styling and toc as per your suggestions. I left the NSF (external) link in so-as to match the styles of other external links, but I adjusted the language to make it more obvious that it is an external link and other links are internal. Maybe as a future update, we could do specific link styling for links that are external in CSS? Add a little icon or something next to them?