Update outputs formatting; Update core APIs

[thelovekesh]

• Add better output formatting
• Replace go-validator with custom validator.
• Fix archive reporting APIs
• Add semaphore in installer to limit number of unpack instances
• Add network concurrency to download manifest and tarballs concurrently. Also, added a cli flag to limit concurrency.
• Add tarballs caching

[gemini-code-assist]

Summary of Changes

Hello @thelovekesh, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request introduces a suite of enhancements focused on improving the user experience, performance, and reliability of the WPM CLI. Key changes include a new, standardized output formatting system, a custom-built validation engine for wpm.json files, and a significantly overhauled package installer. The installer now leverages concurrency, tarball caching, and atomic operations to provide faster and more robust dependency management. Additionally, core API types have been refactored for better organization, and error reporting for dependency resolution has been made more informative.

Highlights

• Enhanced Output Formatting: Introduced a new pkg/output package and integrated it across the CLI to provide standardized, colorized, and more readable output for various commands, including installation and publishing. This centralizes output logic and improves user experience.
• Custom Validation Logic: Replaced the external go-playground/validator library with a custom validation package (pkg/pm/wpmjson/validator). This change provides more granular control over validation rules for wpm.json fields and offers structured error reporting.
• Improved Installer Performance and Robustness: Significantly refactored the package installer to support network concurrency for fetching manifests and tarballs, implement tarball caching, and introduce a semaphore to limit concurrent unpack operations. This makes installations faster and more resilient.
• Atomic Package Installation/Update: The installer now performs atomic directory replacements for packages, ensuring that updates or installations are less prone to corruption and can attempt rollbacks in case of failure. This includes handling cross-device moves and retrying file deletions.
• Refactored Core API Types: Extracted common types (PackageType, Dependencies, etc.) into a new pkg/pm/wpmjson/types package and introduced a dedicated pkg/pm/wpmjson/manifest package for registry manifest definitions. This improves modularity and clarity of data structures.
• Structured Dependency Resolution Errors: The dependency resolver now returns structured ResolutionError types, providing clearer and more actionable messages for version conflicts or downgrades, guiding users on how to resolve issues.

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[github-actions]

📦 wpm cli builds 📦

• darwin/amd64 - build
• darwin/arm64 - build
• linux/amd64 - build
• linux/arm/v6 - build
• linux/arm/v7 - build
• linux/arm64 - build
• linux/ppc64le - build
• linux/riscv64 - build
• linux/s390x - build
• windows/amd64 - build
• windows/arm64 - build

[gemini-code-assist]

Code Review

This pull request introduces a significant and impressive refactoring of core functionalities, including the installer, validator, and output handling. The changes greatly improve robustness, performance, and user experience. Key improvements include the introduction of tarball caching, atomic package updates via a backup-and-restore mechanism, concurrent downloads, and a custom validator for more precise error messages. The code structure is also much cleaner with better separation of concerns. I've identified a few critical issues related to error handling and nil pointer dereferences that should be addressed, but overall this is a high-quality contribution.