feat: add package analysis with local and tarball dependency reporting to CLI

[dreyfus92]

This PR adds a dependency analyzer to the CLI, enabling detailed package analysis in two ways:

Local Analysis:

• Reports total, direct, dev, peer, optional, and bundled dependencies
• Shows CJS/ESM counts and install size based on your installed node_modules
• Provides clear, formatted output with dependency counts and package metadata

Tarball Analysis:

• Reports dependency counts and install size from the tarball
• Includes a list of files in the tarball (optional)
• Shows a clear note that CJS/ESM stats are not available for tarballs
• Provides package metadata from the tarball

I've also added tests for the dependency analysis utilities and improved code documentation.

Related: #2

[bluwy]

LGTM 👍 A couple things I notice but I don't think it's urgent since this project is still in early stages:

1. analyze-dependencies.ts seems to import node builtin modules, so the library itself can't be used in the browser.
2. Is the commented out // this.log lines for debugging only or wip? Maybe good to comment at the top of the file if it's the former.
3. The dimmed messages under Tarball Analysis are a bit hard to read on my terminal
4. The tarball files printed could be a bit long and interfere with the logging. Maybe we could add a hint like npm pack --dry-run for users to check themselves.

[dreyfus92]

Thank you for the review @bluwy, I will try to address your comments on this PR so they don't get lost in time & space 😁

[43081j]

sorry this took so long

looks good to me now. we can iterate further in new branches 👍