make fish dotfiles more verbose + add gitignore function to generate .gitignore files

homes/modules/fish.nix

@@ -12,6 +12,14 @@
   config = {
     programs.fish = {
       enable = true;
+      generateCompletions = true;
+
+      vendor = {
+        config.enable = true;
+        functions.enable = true;
+        completions.enable = true;
+      };
+
       interactiveShellInit = ''
         # add dotnet completions if it exists (ie we're in a virtual environment)
         if type -q dotnet
@@ -27,8 +35,13 @@
           echo -n $greetings[(random 1 (count $greetings))]
         end
 
+        function gitignore -a type
+          curl -sL "https://www.gitignore.io/api/$type"
+        end
+
         set -g fish_greeting (rand_greet)
       '';
+
       plugins = [
         {
           name = "grc";