Plugin: Digital Ocean Cloud Provider

To be used with terraform for creating infrastructure in digital ocean
https://registry.terraform.io/providers/digitalocean/digitalocean/latest/docs

**Describe the solution you'd like**
We should have a cloud provider plugin for Digital Ocean similar to the [AWS plugin](https://github.com/bitops-plugins/aws)

**Additional context**
- [Digital Ocean StackStorm droplet](https://github.com/digitalocean/droplet-1-clicks/pull/85)

Start with the linked AWS plugin and the DigitalOcean Terraform provider documentation. Compare the AWS plugin's structure and supported configuration with the provider requirements, then define the equivalent DigitalOcean plugin scope. Done means a DigitalOcean cloud provider plugin is available for BitOps and can be used with Terraform.

Written by the indexing model from the issue text.