Add Terraform adapter

[jianzs]

We need to create a Terraform adapter that enables the development of the infrastructure SDK using Terraform. The initial idea is to use CDK-TF for developing the Infra SDKs. The generator will produce platform code that imports the Infra SDKs. This adapter will run the generated platform code to produce a Terraform file, and then execute this file to deploy the infrastructure.

To implement this adapter, you can refer to the implementation of the Pulumi adapter.