DApp Showcase, gallery or celohub?

[karlb]

There's

• https://docs.celo.org/showcase
• https://docs.celo.org/general/gallery and
• https://celohub.org/

to show project building on Celo. Is there a reason for having all three? We should make the difference clear or consolidate them into a single one.

https://docs.celo.org/integration/dapps also has some overlap.