fix: readDir instead of manually defining

i messed up and didnt add the template

so i took a new measure.

flake.nix

@@ -1,20 +1,9 @@
 {
   description = "Flake Template Hell";
-  
-  outputs = _: {    
-    templates = {
-      "go" = {
-        path = ./templates/go;
-        description = "go flake template";
-      };
-      "rust" = {
-        path = ./templates/rust;
-        description = "rust flake template";
-      };
-      "haskell" = {
-        path = ./templates/haskell;
-        description = "haskell flake template";
-      };
-    };
+  outputs = { self }: {    
+    templates = builtins.mapAttrs (name: _: {
+        path = ./templates/${name};
+        description = "Template for ${name} projects.";
+    }) (builtins.readDir ./templates);
   };
 }