the test on line 327 in `src/athena/generator/compose.rs` is checking
that the generated YAML does not contain a `version:` field:

```rust
assert!(!yaml.contains("version:"));
```
This test is actually validating that the version field has been
properly removed from the Docker Compose output.

…ure to make the tests more understandable.

 Enhanced test structure:
- 67 integration tests organized by functionality (CLI, Docker
generation, boilerplate, structural)
- Lightweight structural tests focusing on logic over format (no heavy
snapshot tests)
  - Modular boilerplate tests by framework (FastAPI, Go, Flask)
 

Addition of documentation and modification of the readme file
```
  docs/
  ├── INSTALLATION.md     # Complete installation guide (Makefile, Windows, manual)
  ├── DSL_REFERENCE.md    # Complete DSL syntax and directives reference
  ├── EXAMPLES.md         # Practical .ath file examples
  ├── BOILERPLATE.md      # Project generator documentation
  ├── ARCHITECTURE.md     # System design and components
  ├── DEVELOPMENT.md      # Contributing and development workflow
  └── TESTING.md          # Comprehensive test suite documentation
  ```

…in docs

1. Port conflict detection `compose.rs`
    - Automatically detects duplicate host ports between services
    - Clear error messages with alternative port suggestions
2. Comprehensive integration tests
`tests/integration/error_handling_test.rs`
    - 4 new integration tests following the documented structure
    - Tests via CLI with `assert_cmd` and `predicates`
    - Fixture files created in `tests/fixtures/`
3. Maintained unit tests - compose.rs:tests
- Tests for the `extract_host_port()` and `generate_port_suggestions()`
utility functions
    - Basic generation test maintained