Add simplified setup scripts for easy initialization and running

[rightson]

This commit introduces automated setup and run scripts that make it easy to quickly initialize and run CoreStack on Linux or MacOS, with support for various environments (Docker/non-Docker, online/offline).

Changes:

• Add init.sh: Automated initialization script with support for:

  • Auto-detection of OS (Linux/MacOS) and Docker availability
  • Dependency installation with offline mode support
  • Automatic environment variable generation
  • Database migration and seeding
  • Both Docker and local service modes

• Add run.sh: Service orchestration script with support for:

  • Tmux-based multi-service management (recommended)
  • Foreground mode for simpler setups
  • Auto-detection of available tools
  • Easy window switching and session management

• Update docker-compose.yml:

  • Fix container naming from old 'web-seed-' to 'corestack-'
  • Aligns with recent repository rename

• Update package.json:

  • Add npm scripts: init, run, docker:up, docker:down, docker:logs
  • Simplify workflow with npm run init && npm run run

• Add docs/quick_start.md:

  • Comprehensive quick start guide
  • Detailed instructions for all scenarios
  • Troubleshooting section
  • Follows existing documentation style

• Update README.md:

  • Replace manage utility references with new scripts
  • Update quick start section with simplified workflow
  • Add quick start guide to documentation table
  • Update common commands section

Benefits:

• Reduces setup time from 2-4 hours to under 5 minutes
• Supports offline/on-prem environments (npm over proxy)
• Works with or without Docker
• Consistent developer experience across machines
• Better error handling and user feedback