Future project plans

The short-term plans are documented in [project milestones](https://github.com/ContainerSolutions/terraform-examples/milestones?direction=asc&sort=title&state=open).
And this issue purpose is to document future plans beyond what's in the project milestones.

- [ ] Examples for other/smaller cloud providers (like: [DigitalOcean](https://registry.terraform.io/providers/digitalocean/digitalocean/latest), [Linode](https://registry.terraform.io/providers/linode/linode/latest))
- [ ] Cover other popular terraform providers
- see the list here: [The Top 20 Terraform Providers](https://scalr.com/blog/top-20-terraform-providers/)
- eg. [VMware vSphere](https://registry.terraform.io/providers/hashicorp/vsphere/latest), [Vault](https://registry.terraform.io/providers/hashicorp/vault/latest), [TLS](https://registry.terraform.io/providers/hashicorp/tls/latest), [Azure Active Directory](https://registry.terraform.io/providers/hashicorp/azuread/latest)
- [ ] Cover some less popular but interesting providers
- eg. [GitHub](https://registry.terraform.io/providers/integrations/github/latest/docs)
- [ ] Cover more terraform features