The `strings.Title` function is deprecated because it does not handle Unicode punctuation correctly.
This change replaces its usage in the DOCX, HTML, and Markdown exporters with the recommended `golang.org/x/text/cases` package. This ensures more robust and accurate title-casing for item headings.
- Implement tests for the app service, including course processing from file and URI.
- Create mock implementations for CourseParser and Exporter to facilitate testing.
- Add tests for HTML cleaner service to validate HTML content cleaning functionality.
- Develop tests for the parser service, covering course fetching and loading from files.
- Introduce tests for utility functions in the main package, ensuring URI validation and string joining.
- Include benchmarks for performance evaluation of key functions.
Introduces a modular exporter pattern supporting DOCX and Markdown formats
by implementing Exporter interfaces and restructuring application logic.
Enhances CI to install UPX for binary compression, excluding recent macOS
binaries due to compatibility issues.
Enables CGO when building binaries for all platforms, addressing potential
cross-platform compatibility concerns.
Bumps version to 0.1.1.
