home/terminal/shell: add nushell config, add back fish

home/terminal/shell/default.nix

@@ -3,5 +3,6 @@
     ./starship.nix
     ./zoxide.nix
     ./nushell.nix
+    ./fish.nix
   ];
 }

home/terminal/shell/nushell.nix

@@ -1,6 +1,27 @@
 {
   programs.nushell = {
     enable = true;
+    extraConfig = ''
+            let carapace_completer = {|spans|
+                carapace $spans.0 nushell ...$spans | from json
+            }
+      $env.config = {
+              show_banner: false,
+              completions: {
+              case_sensitive: false # case-sensitive completions
+              quick: true    # set to false to prevent auto-selecting completions
+              partial: true    # set to false to prevent partial filling of the prompt
+              algorithm: "fuzzy"    # prefix or fuzzy
+              external: {
+              # set to false to prevent nushell looking into $env.PATH to find more suggestions
+                  enable: true
+              # set to lower can improve completion performance at the cost of omitting some options
+                  max_results: 100
+                  completer: $carapace_completer # check 'carapace_completer'
+                }
+              }
+             }
+    '';
   };
 
   programs.carapace = {