Support tracing? poetry2nix is hard to debug

[heimalne]

Just wanted to suggest that poetry2nix could benefit from some refactoring and supporting some form of tracing to debug issues by answering at least the following questions:

• what packages were found in poetry.lock and considered
• which packages matched for the current machine (and architecture)
• which packages from poetry.lock were not considered for current machine and why
• which packages were used in the end after all hacks and overrides were applied.

Maybe someone with more intricate knowledge of the code base would be able to work on this?

Related issues that would benefit from having this:
#1616
#1729
#1519
#1340
NixOS/nixpkgs#229210
#1597
etc.