Add vifm (terminal filemgr)

home/programs/terminal/file-managers/default.nix

@@ -1,7 +1,12 @@
+# Note: Pretty much all of these configurations were copied from 
+# https://git.notashelf.dev/NotAShelf/nyx, there may be some small
+# adjustments made to them but the majority of the credit goes to
+# notashelf.
 _: {
   imports = [
     ./yazi
     ./xplr
+    ./vifm
   ];
 }