feat(user/malte,module/base): nnn file manager

modules/base-system.nix

@@ -146,6 +146,8 @@ in {
       ripgrep
       # It's just too handy
       file
+      # file manager
+      nnn
     ];
 
     # Language and timezone defaults

users/malte/default.nix

@@ -101,6 +101,8 @@
       heygpt --system "You will correct any spelling mistakes in the input. No explanations." "$@"
     '';
   };
+
+  nnnIcons = pkgs.nnn.override {withNerdIcons = true;};
 in {
   imports = [
     ./modules/git.nix
@@ -185,6 +187,7 @@ in {
           xdg_utils
           xournalpp
           yt-dlp # youtube-dl alternative that doesn't suck
+          nnnIcons
         ]);
 
       sessionVariables = {