Amplify CLI Core

Core library for AWS Amplify CLI, providing shared utilities, configuration management, and API abstractions used by all Amplify CLI plugins. Current stable version is 4.0.4. Part of the Amplify CLI monorepo which releases roughly weekly. Key differentiators: provides centralized error handling, feature flags, and path management for the CLI ecosystem. Unlike @aws-amplify/cli which is the CLI entry point, this package is the internal toolkit for plugin authors and extension developers.