Optional customization tool for infrastructure projects. This skill should be used when the user says "infra init", "arn infra init", "initialize infra", "setup infrastructure", "arn-infra-init", "configure infra", "init infra", "infrastructure setup", "set up infrastructure", "infra setup", "start infra", "configure arn infra", "add infrastructure to this project", "review infra config", "customize infra config", "infra settings", or wants to configure providers, environments, IaC tools, CI/CD platform, or review current infrastructure settings. Arness Infra auto-configures with sensible defaults on first skill invocation — this init is optional for basic usage but required for provider/environment configuration.