feat: comprehensive project improvements and fixes

- Fix all TypeScript compilation errors (40+ fixes)
  - Add missing type definitions (TransactionRequest, SafeInfo)
  - Fix TransactionRequestStatus vs TransactionStatus confusion
  - Fix import paths and provider type issues
  - Fix test file errors and mock providers

- Implement comprehensive security features
  - AES-GCM encryption with PBKDF2 key derivation
  - Input validation and sanitization
  - Rate limiting and nonce management
  - Replay attack prevention
  - Access control and authorization

- Add comprehensive test suite
  - Integration tests for transaction flow
  - Security validation tests
  - Wallet management tests
  - Encryption and rate limiter tests
  - E2E tests with Playwright

- Add extensive documentation
  - 12 numbered guides (setup, development, API, security, etc.)
  - Security documentation and audit reports
  - Code review and testing reports
  - Project organization documentation

- Update dependencies
  - Update axios to latest version (security fix)
  - Update React types to v18
  - Fix peer dependency warnings

- Add development tooling
  - CI/CD workflows (GitHub Actions)
  - Pre-commit hooks (Husky)
  - Linting and formatting (Prettier, ESLint)
  - Security audit workflow
  - Performance benchmarking

- Reorganize project structure
  - Move reports to docs/reports/
  - Clean up root directory
  - Organize documentation

- Add new features
  - Smart wallet management (Gnosis Safe, ERC4337)
  - Transaction execution and approval workflows
  - Balance management and token support
  - Error boundary and monitoring (Sentry)

- Fix WalletConnect configuration
  - Handle missing projectId gracefully
  - Add environment variable template

docs/11-contributing.md

@@ -0,0 +1,72 @@
+# Contributing Guide
+
+Thank you for your interest in contributing to Impersonator!
+
+## Getting Started
+
+1. Fork the repository
+2. Clone your fork
+3. Create a feature branch
+4. Make your changes
+5. Write/update tests
+6. Submit a pull request
+
+## Development Workflow
+
+### 1. Create Feature Branch
+
+```bash
+git checkout -b feature/your-feature-name
+```
+
+### 2. Make Changes
+
+- Follow code style guidelines
+- Write tests for new features
+- Update documentation
+- Add JSDoc comments
+
+### 3. Test Your Changes
+
+```bash
+pnpm test
+pnpm lint
+```
+
+### 4. Commit Changes
+
+Use conventional commits:
+
+```
+feat: add new wallet type
+fix: resolve address validation bug
+docs: update API documentation
+test: add integration tests
+refactor: extract constants
+```
+
+### 5. Push and Create PR
+
+```bash
+git push origin feature/your-feature-name
+```
+
+## Code Standards
+
+- Follow TypeScript best practices
+- Use Prettier for formatting
+- Pass ESLint checks
+- Write comprehensive tests
+- Document public APIs
+
+## Pull Request Process
+
+1. Update README if needed
+2. Add tests for new features
+3. Ensure all tests pass
+4. Update documentation
+5. Request review
+
+## Questions?
+
+Open an issue or contact maintainers.