feat: [#155] Create Input Layer in presentation module

[josecelano]

Overview

This PR implements Proposal 1: Create Input Layer from the presentation layer reorganization epic (#154). It establishes a dedicated Input Layer for user input parsing and validation as the foundation of the four-layer presentation architecture.

Changes Made

🏗️ Architecture

• Input Layer established: Created as the new Input Layer
• CLI module relocated: Moved from to
• Four-layer foundation: Establishes Input → Dispatch → Controllers → Views architecture

📁 File Changes

• New: - Input Layer module with comprehensive documentation
• Moved: → (args.rs, commands.rs, mod.rs)
• Updated: All import paths from presentation::cli to presentation::input::cli
• Enhanced: with Input Layer integration and re-exports

🔧 Backward Compatibility

• Maintained through re-exports in
• Existing code using continues to work
• No breaking changes to public API

Validation

✅ Build: Project compiles successfully
✅ Tests: All 1200+ unit tests pass
✅ Documentation: All 290 doc tests pass
✅ CLI: Command-line interface works correctly
✅ Imports: All import paths verified and updated

Architecture Benefits

• Clear Separation: Input parsing isolated from command execution
• Single Responsibility: Each layer has a focused purpose
• Testability: Input validation can be tested independently
• Extensibility: Easy to add new input sources (web UI, API, config files)
• Error Handling: Input validation errors handled at appropriate layer

Documentation

The Input Layer includes comprehensive documentation explaining:

• Purpose and responsibilities
• Integration with presentation layer architecture
• Module structure and organization
• Design principles and future enhancements
• Relationship to the broader reorganization effort

Related Issues

• Closes Proposal 1: Create Input Layer #155
• Part of epic [EPIC] Presentation Layer Reorganization #154 (Presentation Layer Reorganization)

Next Steps

This establishes the foundation for subsequent proposals in the presentation layer reorganization:

• Proposal 2: Create Dispatch Layer
• Proposal 3: Organize Controller Layer
• Proposal 4: Enhance View Layer

Review Notes

• All changes follow project DDD conventions and module organization guidelines
• Import path updates were systematically verified across the codebase
• Documentation includes examples and integration guidance
• Changes maintain full backward compatibility through re-exports

[josecelano]

ACK d020eb2