NOTE. I do not know if my answer will satisfy if you use Windows Explorer as the main file manager.
I use Total Commander as a file manager. Under Total Commander, you can set which files to see and which you do not want to see. Go to Configuration → Settings → Ignore list and enter * .identcache in the list. There are files, but you will not see them anymore. You can ignore any other unwanted Delphi file or system file (for example, such nasty desktop.ini files).
Another trick: if you have a dedicated plugin for Total Commander, you can press F3 on any PAS file and the file will be INSTANTly opened in a viewer similar to Delphi (with syntax highlighting).