[RFC] new top-level website nav item "credits"

[drammock]

It would be nice to make our pages that give folks credit for their contributions more prominent.
A new top-level nav category "credits" could make the following pages (currently all orphans) easier to find:

• People (suggest renaming to "leadership")
• Credit (suggest renaming to "contributors")
• Funding (suggest renaming to "supporters")

in #12572 @cbrnr also suggested removing the "wall of avatars" from our homepage; this category would provide a natural place to move it to (either as its own page, or as part of the "credit / contributors" page)

[larsoner]

@drammock looks like you already have a couple 👍 on this one and I'll add mine! Okay for me to be done concurrently with #13576 as well if it makes life easier for you