Add additional app details

[fallscameron01]

Add additional app details, including current projects such as MultirotorGroundControl and the docs site. Also should update the descriptions of Propguard and Paracord to include their current state/usability.

[cjhr95]

Add page about compakt as well.

[Malizma333]

Add page about compakt as well.

I might turn this into a separate issue. UnIess someone else has insight about past app initiatives, I don't know enough to update that part of the docs.