Feature: Vast.ai Terraform/OpenTofu provider

[samuelstolicny]

Motivation

A Terraform/OpenTofu provider for Vast.ai does not currently exist. This is a prerequisite for adding Vast.ai as a supported cloud provider in Claudie, as Claudie uses Terraform for infrastructure provisioning.

Description

Implement a Terraform/OpenTofu provider for Vast.ai that supports managing Vast.ai resources. This provider will be consumed by Claudie's Terraformer service to provision and manage Vast.ai infrastructure.

Exit criteria

• Terraform/OpenTofu provider for Vast.ai implemented
• Provider published and available for use
• Basic resource types supported (instances, networking, etc.)