docs: Add comprehensive development guidelines and feature roadmap

Author: owdax

DEVELOPMENT.md

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+# Development Guidelines
+
+## Change Integration Checklist
+
+### 📝 Documentation
+- [ ] Update DocC documentation
+- [ ] Update code comments and doc strings
+- [ ] Check README.md for any needed updates
+- [ ] Update CHANGELOG.md
+- [ ] Verify all documentation links work
+- [ ] Update examples if relevant
+
+### 💻 Code
+- [ ] Follow architectural principles
+- [ ] Maintain Swift best practices
+- [ ] Update tests
+- [ ] Add performance tests if needed
+- [ ] Run full test suite
+- [ ] Check for SwiftLint compliance
+- [ ] Run SwiftFormat
+
+### 🏗 Infrastructure
+- [ ] Update CI/CD workflows if needed
+- [ ] Verify GitHub Actions still pass
+- [ ] Update development tools if needed
+- [ ] Check build settings
+- [ ] Verify package dependencies
+
+### 📊 Version Management
+- [ ] Update version numbers if needed:
+  - Package.swift
+  - SwiftDevKit.version
+  - Documentation references
+  - Installation guides
+
+### 🔍 Final Verification
+- [ ] Run all tests
+- [ ] Build documentation
+- [ ] Verify in a clean environment
+- [ ] Check git commit messages
+- [ ] Review PR description
+
+## Feature Implementation Checklist
+
+### 📋 Planning Phase
+- [ ] Define feature scope
+- [ ] Document use cases
+- [ ] List requirements
+- [ ] Consider platform compatibility
+- [ ] Plan error handling
+- [ ] Design API surface
+
+### 🎯 Implementation Requirements
+- [ ] Public API documentation
+- [ ] Implementation documentation
+- [ ] Unit tests
+- [ ] Performance tests
+- [ ] Example usage
+- [ ] Error handling
+- [ ] Thread safety consideration
+- [ ] Memory management
+- [ ] Backward compatibility
+
+### 🔍 Testing Requirements
+- [ ] Unit tests for happy path
+- [ ] Unit tests for error cases
+- [ ] Performance benchmarks
+- [ ] Platform-specific tests
+- [ ] Integration tests
+- [ ] Documentation tests
+
+### 📚 Documentation Requirements
+- [ ] API documentation
+- [ ] Usage examples
+- [ ] Integration guide
+- [ ] Migration guide (if needed)
+- [ ] Update feature list
+- [ ] Update architecture docs
+
+### ⚡️ Performance Requirements
+- [ ] Memory usage analysis
+- [ ] CPU usage analysis
+- [ ] Thread safety verification
+- [ ] Benchmark against alternatives
+- [ ] Optimization opportunities
+
+## Feature Categories and Complexity
+
+### 1️⃣ Data Conversion (Start Here)
+- String conversions (Basic)
+- Number formatting (Basic)
+- Date formatting (Basic)
+- Unit conversions (Intermediate)
+- Data encoding/decoding (Intermediate)
+- Custom format conversions (Advanced)
+
+### 2️⃣ Text Processing
+- String manipulation (Basic)
+- Regular expressions (Intermediate)
+- Text validation (Basic)
+- Pattern matching (Intermediate)
+- Text analysis (Advanced)
+- Natural language processing (Advanced)
+
+### 3️⃣ Development Helpers
+- Debug utilities (Basic)
+- Logging (Basic)
+- Property wrappers (Intermediate)
+- Code generation helpers (Advanced)
+- Debugging tools (Advanced)
+
+### 4️⃣ Cryptography
+- Hash functions (Basic)
+- Encoding/Decoding (Basic)
+- Encryption/Decryption (Advanced)
+- Digital signatures (Advanced)
+- Secure random generation (Intermediate)
+
+### 5️⃣ Platform Utilities
+- Device info (Basic)
+- System capabilities (Basic)
+- Platform-specific optimizations (Advanced)
+- Hardware interaction (Advanced)
+- System integration (Advanced)
+
+## Implementation Order
+1. Start with basic Data Conversion features
+2. Move to basic Text Processing
+3. Implement basic Development Helpers
+4. Add basic Cryptography features
+5. Include basic Platform Utilities
+6. Gradually add intermediate features
+7. Finally implement advanced features
+
+Each feature should go through all checklist items before being considered complete.