Simplify creating a new provider from boilerplate

[AaronFriel]

Creating a new provider from the boilerplate requires a good deal of manual find-and-replace. Either #86 or another method should be considered to make it easier to start a repository from scratch, e.g., to not assume the GitHub org is "pulumi" or the NPM scope is "@pulumi".

For example, here the owner is assumed to be pulumi:

https://github.com/pulumi/pulumi-provider-boilerplate#creating-and-initializing-the-repository