Don't follow symbolic links for pdm add

[DUOLabs333]

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

I have all of my repos in one folder and all other places that I use them are symbolically linked to that folder. I have a few such folders in PDM folders, like ./foo. However, when doing pdm add -e ./foo, I want the pyproject.toml to point to ./foo, not whatever folder ./foo is linked to.

Describe the solution you'd like

For PDM not to list the original location of a folder/file as the location in the pyproject.toml, pdm.lock, and .pth files.