fish: add fishy function

fish/functions/fishcognito.fish

@@ -1,3 +0,0 @@
-function fishcognito --description "Start a new shell in private mode"
-    fish --private
-end

fish/functions/fishy.fish

@@ -0,0 +1,17 @@
+function fishy -d "Run fish in a non-standard way" -a fishy_opt
+    if test -z "$fishy_opt"
+        printf "How do you want to run fish?\n 1) In private mode\n 2) With default config\n"
+        read fishy_opt -P "> "
+    end
+    switch $fishy_opt
+        case 1
+            echo "Starting fish in private mode..."
+            fish --private
+        case 2
+            echo "Starting fish with default configuration..."
+            HOME=(mktemp -d) fish
+        case '*'
+            echo (set_color red)"Invalid option: [$fishy_opt]"(set_color normal)
+            return 1
+    end
+end