feat(tarko): support dynamic agent from npm package manager

[ulivz]

Summary

Implements TarkoNPMPackageManager to support dynamic agent loading from NPM packages as requested in issue #1177.

Key Features

• Smart Package Resolution: Supports both full package names (@omni-tars/agent) and shortcut syntax (omni-tars → tarko-omni-tars)
• Parallel Resolution Strategy: Tries tarko-{name} first, then falls back to {name} with priority handling
• Global Package Store: Maintains local cache at ~/.tarko/packages/ with registry metadata
• Tarko Compliance Validation: Ensures packages are valid Tarko agents before installation
• CLI Integration: Seamlessly integrated with tarko run command with --update and --tag options
• Comprehensive Error Handling: Provides helpful suggestions when packages aren't found

Usage Examples

# Full package names
tarko run @omni-tars/agent
tarko run tarko-my-agent

# Shortcut syntax
tarko run omni-tars  # Resolves to tarko-omni-tars
tarko run github     # Resolves to tarko-github

# Package management
tarko run my-agent --update
tarko run my-agent --tag beta

Implementation Details

• Created new package @tarko/npm-package-manager with core functionality
• Updated agent-cli to integrate NPM package resolution in resolveAgentFromCLIArgument
• Added comprehensive test coverage for package resolution and validation
• Follows existing project patterns and conventions

Close: #1177

Checklist

• Added or updated necessary tests (Optional).
• Updated documentation to align with changes (Optional).
• Verified no breaking changes, or prepared solutions for any occurring breaking changes (Optional).
• My change does not involve the above items.

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