Allow outputting terraform-plugin-framework types for documentation and LSP

[gdavison]

Use-cases

When Terraform outputs a provider schema, it only recognizes the built-in Terraform types, such as String, Number, Bool plus the collection types. The Terraform Plugin Framework overrides Number with Int64 and Float64 types, plus providers can add custom types.

The Terraform schema for Int64 and Float64 still reports Number in the schema. Custom provider types will also report the underlying built-in Terraform type.

Proposal

Since Terraform is unaware of Terraform Plugin Framework and custom provider types, this cannot be resolved in Terraform schema. Consider adding a gRPC server that can return richer schema information that can be consumed by tooling such as terraform-plugin-docs or terraform-ls