Add components from metropolis polis fork

[patcon]

There is a fork of Polis that made lots of interface changes, which Polis practitioners might wish to consider and compare:

https://github.com/canvasxyz/metropolis
https://metropolis.vote/ https://poll.fil.org/

Like UT-HAI's fork, this merged all client components into a single app: (the src/components and src/pages directories)
https://github.com/canvasxyz/metropolis/tree/main/client