refactor: organize shell settings

users/profiles/shells/all.nix

@@ -0,0 +1,7 @@
+{ ... }: {
+  imports = [
+    ./bash.nix
+    ./fish.nix
+    ./zsh.nix
+  ];
+}

users/profiles/shells/bash.nix

@@ -1,4 +1,6 @@
 { config, pkgs, ... }: {
+  imports = [ ./common.nix ];
+
   programs = {
     bash = {
       enable = true;

users/profiles/shells/common.nix

@@ -1,7 +1,3 @@
 { ... }: {
-  imports = [
-    ./bash.nix
-    ./fish.nix
-    ./zsh.nix
-  ];
+  programs.command-not-found.enable = true;
 }

users/profiles/shells/fish.nix

@@ -1,4 +1,6 @@
 { config, lib, pkgs, ... }: {
+  imports = [ ./common.nix ];
+
   programs = {
     fish = {
       enable = true;

users/profiles/shells/zsh.nix

@@ -1,4 +1,6 @@
 { config, lib, pkgs, ... }: {
+  imports = [ ./common.nix ];
+
   programs = {
     zsh = rec {
       enable = true;