Add support for digitalocean_project_resources resource

[yordis]

Problem Statement

I would like to use https://registry.terraform.io/providers/digitalocean/digitalocean/latest/docs/resources/project_resources so that I can organize the resources

Solution Brainstorm

It seems that it will require Composition because the values of digitalocean_project_resources.*.resources are a list of references to multiple resources.

Or verify that all resources allow you to have a reference to a project:

• App Platform Apps
• Database Clusters
• Load Balancers
• Domains (does not support project ID)
• Droplets (does not support project ID)
• Floating IPs (does not support project ID)
• Kubernetes Clusters (does not support project ID)
• Spaces Buckets (does not support project ID)
• Volumes (does not support project ID)