[WIP] Target logfault::logfault not working

[Copilot]

Thanks for assigning this issue to me. I'm starting to work on it and will keep this PR's description up to date as I form a plan and make progress.

Original issue description:

This project is supposed to export a logfault::logfault cmake target but it is not working.

Refactor the cmake files and test it to make sure it works.

I want cmake projects who use FetchContent or add_subdirectory to use this library to be able to specify logfault::logfault as a target in target_link_libraries()

Make sure that header files are available if they use logfault::logfault as a link target.

Add usage instructions to the readme.

Fixes #17.

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