Is there a standard Github topic in use to find pulumi code repositories? The TF community uses

terraform-provider

and

terraform-module

to find providers and/or modules.

Not yet. The 1st party providers and packages are all in

pulumi

currently, and others are published publicly or privately by individuals/orgs. We do expect to provide easier discovery/registration in the future - either via github org or via something closer to a package manager.