* add digitalocean_project_resource
* update docs for digitalocean_project_resource
* allow `resources` on digitalocean_project to be computed
* rename digitalocean_project -> digitalocean_projects
* switch to managing multiple resources
* update docs for the changes to the resource
* use Id in read function
* Simplify read method further.
Co-authored-by: Andrew Starr-Bochicchio <a.starr.b@gmail.com>
Tom Dyas