refactor(makefile): improve build targets and update versioning logic

[supitsdu]

• Removed redundant third argument from the build function calls.
• Updated the checksums target to dynamically list binaries in the output directory.
• Added a new .PHONY target for version to display the latest git tag version.
• Simplified the install and cleanup targets for clarity and efficiency.
• Improved the help target to provide comprehensive usage instructions.
• Ensured the clean target effectively removes the output directory.

These changes enhance the Makefile's maintainability and provide clearer, more efficient build processes.

[ccoVeille]

Hi @supitsdu

I'm curious if unmake would report errors

https://github.com/mcandre/unmake

Note: I don't have a computer at my holidays place, only a phone