[dependencies] Remove unmaintained dependency "zap-logfmt"

[liran-funaro]

The package github.com/sykesm/zap-logfmt is no longer maintained (last commit was 5 years ago).
This commit removes this dependency.

• resolves Remove dependency on github.com/sykesm/zap-logfmt #53

[liran-funaro]

Pass all Fabric unit tests: https://github.com/liran-funaro/fabric/actions/runs/28320919435

[liran-funaro]

@pfi79 , friendly ping on this whenever you get a chance to review. Thanks!

[pfi79]

I'll try to criticize your PR.:

1. here is the commit that added logfmt. It seems to me that you have deleted more code than necessary in your change.
2. I still don't like that with the removal of the library dependency, you also removed the logfmt setting. Try to keep logfmt, but remove the dependency on the library.