Polish fish experience and remove zsh again.

common/user-ppetru.nix

@@ -1,7 +1,6 @@
 { pkgs, ... }:
 {
   programs.fish.enable = true;
-  programs.zsh.enable = true;
   users.users.ppetru = {
     isNormalUser = true;
     extraGroups = [

home/packages.nix

@@ -10,7 +10,9 @@
       zsh
     ]
     ++ (with pkgs.fishPlugins; [
+      pure
       # don't add failed commands to history
       sponge
+      transient-fish
     ]);
 }

home/programs.nix

@@ -2,6 +2,16 @@
 {
   fish = {
     enable = true;
+
+    shellInit = ''
+      set fish_greeting
+
+      set pure_color_mute green
+      set pure_check_for_new_release false
+      set pure_enable_nixdevshell true
+      set pure_show_prefix_root_prompt true
+      set sponge_regex_patterns 'password|passwd'
+    '';
   };
 
   git = {