Link could ignore names or files from a specified list or of a particular nameclass

**Is your feature request related to a problem? Please describe.**
After linking my project, if I import a tool to the same namespace and either intentionally or accidentally modify it, then I get a copy of the tool in my project source which I have to subsequently delete or .gitignore or whatever. This is particularly relevant if I link my project to the root namespace `#`.

**Describe the solution you'd like**
Some configuration parameter could be a list of either/or a combination of names, file paths, nameclasses and/or file extensions for link to ignore.

**Describe alternatives you've considered**
Everyone must always keep their projects modular and link/import each piece to a separate namespace.