Add domain layer components:
- BaseEntity with ID, timestamps and equality checks
- ValueObject for immutable value objects
- IRepository interface for persistence
- DomainEvent system for domain events
Add ESLint rules to enforce comment style:
- Require space after // in single-line comments
- Prefer JSDoc style for multi-line comments
- Warn on TODO/FIXME/HACK comments
- Update documentation with comment style guide
Add EditorConfig for consistent editor settings, Prettier for formatting (4-space indentation), ESLint with TypeScript rules, and linting documentation
