modules/pipewire: rewrite parts of the module

[aanderse]

work in progress to simplify and standardize the pipewire module in anticipation of moving it into finix-community/finix

cc @deathbymanatee

[deathbymanatee]

thanks for the updates! if finix ever defines a set of conventions on the main repo, i can start enforcing them here as well in the event that you would like to one day bring a subset of modules over to main. that way, there will be less work needed to refine it before upstreaming