command: utility for rendering tfdiag diagnostics
command: utility for rendering tfdiag diagnostics

This new method showDiagnostics takes any value that would be accepted by
tfdiags.Append and renders it to the UI.

This is intended to encourage consistent handling of the different kinds
of errors and diagnostics that can be produced, and allow richer error
objects like the HCL2 diagnostics to be easily unwrapped and shown in
their full-fidelity.

hashicorp/terraform-plugin-sdk,hashicorp/terraform-plugin-sdk