feat: add search, update, catalog and remove commands

[dongguacute]

Summary

This PR adds four new commands to enhance the package management experience:

• nai search - Search npm registry for packages
• nai update - Batch update dependencies to latest versions
• nai catalog - Browse and manage catalog versions
• nai remove - Remove packages from dependencies

Changes

New Files

File	Description
src/npm.ts	npm registry API utilities (search, versions, outdated check)

Modified Files

File	Changes
src/cli.ts	Added search, update, catalog commands with interactive UI
README.md	Documented new commands and usage examples

Features

🔍 nai search (alias: nai s)

Search npm registry interactively:

nai search react
nai s "ui framework"

• Searches npm registry using the official search API
• Displays package name, version, and description
• Select a package from results to install directly

📦 nai update (alias: nai up)

Check and update outdated packages:

nai update              # Check all packages for updates
nai update react lodash # Update specific packages
nai update -i           # Interactive mode - select packages to update

• Automatically detects outdated dependencies
• Respects catalog references - updates catalog entries when needed
• Interactive multi-select for choosing which packages to update
• Colorful summary showing old → new versions

🗂️ nai catalog

Browse catalogs and change dependency versions:

nai catalog        # Interactive catalog browser
nai catalog --list # List all catalogs with dep counts

• View all catalogs and their dependencies
• Select packages within a catalog
• Fetch available versions from npm
• Choose new version from a list of recent releases
• Updates catalog entries and runs install automatically

🗑️ nai remove (alias: nai rm)

Remove packages from dependencies:

nai remove              # Interactive - select packages to remove
nai remove react lodash # Remove specific packages
nai rm axios --clean-catalog # Also remove unused catalog entries

• Shows all dependencies across workspace packages
• Multi-select packages to remove
• Indicates which packages and dep types are affected
• Optional catalog cleanup with --clean-catalog
• Updates all relevant package.json files

Technical Details

src/npm.ts

New module providing npm registry interactions:

• searchNpm(query, options) - Search npm registry
• getPackageVersions(packageName) - Fetch all available versions
• checkOutdated(deps, options) - Compare current versions with latest

UI/UX

All new commands follow the existing design patterns:

• Uses @clack/prompts for consistent interactive UI
• Colorful output with ansis
• Spinner feedback during network operations
• Summary confirmation before making changes

Test Plan

• [✅] Existing tests pass (100 tests)
• [✅] Build succeeds
• [✅] Manual test: nai search react
• [✅] Manual test: nai update in a project with outdated deps
• [✅] Manual test: nai catalog in a monorepo with catalogs
• [✅] Manual test: nai remove to uninstall packages

（以上就是具体描述，让AI总结的，指令我都试了一遍正常的，基本就是完善了一下基础功能，希望能够合并，谢谢）