feat: convert to Turborepo monorepo with 1 apps

[turbomono-creator]

🚀 Monorepo Setup Complete

This PR converts the repository into a Turborepo monorepo structure with the following apps:

Applications Added:

• public-practice (unknown)

Changes Made:

• ✅ Moved existing code to apps/public-practice
• ✅ Imported 2 external repositories as subtrees
• ✅ Configured Turborepo pipeline for optimal builds
• ✅ Set up npm workspaces
• ✅ Added shared tooling and configuration

Monorepo Structure:

public-practice-monorepo/
├── apps/
│   ├── public-practice/
├── packages/                    # Shared packages (empty for now)
├── package.json                 # Root workspace configuration  
├── npm-workspace.yaml    # Workspace settings
└── turbo.json                  # Turborepo pipeline configuration

Getting Started:

# Install dependencies
npm install

# Start development mode
npm dev

# Build all applications
npm build

# Run linting across all apps
npm lint

Next Steps:

1. Review and merge this PR
2. Set up CI/CD pipelines using Turborepo
3. Consider extracting shared code into packages/
4. Add any missing environment variables

This monorepo is ready for development! 🎉