Support registry.terraform.io

[BSick7]

Overview

Today, all infrastructure modules must exist in the Nullstone registry to be selected for provisioning.
This requires effort to mirror versions from the official registry (registry.terraform.io) manually.
Instead, a user should be able to select a module in the official registry.

How will it work?

• A user registers a module in "mirror" mode
• During registration, a user needs to provide taxonomy for the module (i.e. category, provider, platform)
• Nullstone will utilize the github repo from the official registry to ingest module versions that are available for users to select