print worktree path fo flake folders instead of store path

[RonnyPfannschmidt]

Is your feature request related to a problem? Please describe.

when developing flakes in a git repo, whenever i get a error, the store path is printed instead of the source tree path,
this makes it a pain to click to the filename in a ide, as its always jumping to the errors in the store, instead of the worktree

Describe the solution you'd like

for store paths derived from the current working directory, print the working directory filename if possible

Additional context

$ . build-vm.sh 
warning: Git tree '/home/ronny/Projects/RonnyPfannschmidt/nixos' is dirty
error: syntax error, unexpected '}', expecting ';'

       at /nix/store/cq60cn270jc82ij9fldvrjipsvnvmjiy-source/modules/unfree.nix:7:1:

in that example the local filename is modules/unfree.nix
however when one would click to the path for example in the vscode terminal, one would jump to the store instead of the local file one can actually edit

[edolstra]

Related: #4507

[nixos-discourse]

This issue has been mentioned on NixOS Discourse. There might be relevant details there:

https://discourse.nixos.org/t/tweag-nix-dev-update-24/17230/1