Incrementally improve unit test coverage

[rkcoder101]

Description
Currently, the code coverage for the project stands at approximately 11% . To ensure the stability of the CLI, prevent regressions, and facilitate safer refactoring in the future, we should aim to increase this coverage. This would also fix a part of #94

Goals

• Identify critical paths that are currently untested.
• Add unit tests for utility functions, commands and other parts of the project.

[rkcoder101]

Hi @bupd @Vad1mo I’d like to start improving test coverage by writing tests for the docs generator code. I will share my progress on the way and would ask for help if I need it at some point. Thanks!