feat: add comprehensive project templates and examples

[Jim8y]

Summary

This final PR completes the deployment toolkit with comprehensive project templates, real-world examples, complete documentation, and workflow automation - providing everything developers need for professional Neo smart contract development.

Key Features

• ✅ Complete project templates for dotnet new neocontractsolution
• ✅ Multi-contract example solution with Token, NFT, and Governance contracts
• ✅ Deployment CLI tool demonstrating all toolkit features
• ✅ Comprehensive documentation suite with guides and API reference
• ✅ GitHub Actions workflows for CI/CD automation
• ✅ Shell and PowerShell scripts for common development tasks
• ✅ Template validation with quality assurance testing

Project Templates

• Configurable template options: Basic, NEP-17, NEP-11, Governance contract types
• Optional components: Unit testing projects, deployment toolkit integration, security features
• Complete project structure: Solution files, build props, configuration, documentation
• Easy project creation: dotnet new neocontractsolution --name MyProject

Comprehensive Examples

• DeploymentExample solution with complete implementation examples:
  • SimpleContract: Basic storage operations and deployment
  • TokenContract: NEP-17 fungible token with full functionality
  • NFTContract: NEP-11 non-fungible token implementation
  • GovernanceContract: Voting and governance with multi-signature support
• Deployment CLI tool: Command-line interface demonstrating all features
• Multi-contract deployment: Manifest-based deployment with dependencies

Documentation Suite

• Getting started guides: Step-by-step tutorials for new developers
• Core concepts: Comprehensive explanation of deployment patterns
• API reference: Complete documentation of all classes and methods
• Best practices: Security guidelines and development recommendations
• Troubleshooting: Common issues and solutions

Workflow Automation

• GitHub Actions: Automated deployment, testing, and release workflows
• Cross-platform scripts: Both bash and PowerShell automation
• Template validation: Automated quality checks and build verification
• CI/CD examples: Complete pipelines for production deployments

Files Added/Modified

• src/Neo.SmartContract.Template/templates/neocontractsolution/ - Complete project template
• examples/DeploymentExample/ - Comprehensive example solution
• docs/ - Complete documentation structure
• .github/workflows/ - CI/CD automation workflows
• scripts/ - Template validation and utility scripts
• Template tests and quality assurance

Dependencies

• Depends on: PR feat: add production-ready security and monitoring capabilities #1355 (Security Enhancements)
• Completes: The entire deployment toolkit feature set

Testing

• ✅ Template functionality tests
• ✅ Example solution builds and tests successfully
• ✅ Documentation validation
• ✅ Workflow automation testing
• ✅ Quality assurance validation scripts

Usage Examples

# Create new project from template
dotnet new neocontractsolution --name MyDeFiProject --contract-type token --include-tests true

# Deploy using example CLI
cd examples/DeploymentExample
dotnet run --project deploy/DeploymentExample.Deploy

# Run automated deployment
./scripts/deploy-all.sh testnet

This provides developers with complete tooling, examples, and documentation for professional Neo smart contract development and deployment workflows. The toolkit is now feature-complete and production-ready.