title: Include external files (not libraries) in a project in Intellij
body: <p>I have a project ‘P’ in directory ‘P’. I want the use a css file in ‘P’ but the css file is not in directory ‘P’. It is at one level above ‘P’. Could I still include/use the css file in ‘P’ without changing the directory structure or making a copy of the css file? </p>