Add CI/CD workflow and cleanup dependencies

[chriscamicas]

Summary

Adds automated CI/CD pipeline for testing and npm publishing, plus dependency cleanup and package configuration.

Key Changes

CI/CD Pipeline

• GitHub Actions workflow for automated testing on push/PR
• Automatic npm publishing when version tags are pushed
• Includes npm provenance for enhanced security

Package Configuration

• Configured for npm publishing with proper metadata
• Scoped package name: @datadome/datadome-mcp-server
• Added CLI bin entry point

Testing

• ✅ All tests pass (33/33)
• ✅ Type checking passes
• ✅ Build succeeds