Revamping the Harbor Cli

[amands98]

Enhance the current CLI code by implementing the following measures for a smoother development experience, easier CLI installations, a structured release cycle, and more:

• [x] Structure the project directory.
• [x] Creating a Release
• [x] Improve the release channel for the harbor cli, Integrated GitHub release workflows for streamlined version management.
• [x] Automate the harbor upgrade in package manager
• [ ] Improve the error message
• [ ] Support for e2e tests & docs
• [ ] Automation of docs generation
• [ ] Implemented support for codecov to ensure comprehensive code coverage
• [x] Discover more available subcommands for harbor-cli

// @Vad1mo @OrlinVasilev

[Shivkant-Chauhan]

hey @amands98, it seems that this issue is for the Harbor CLI project that is listed under the LFX mentorship program -- link.