Added epic ex058 - quiz 7

build.zig

@@ -297,6 +297,11 @@ const exercises = [_]Exercise{
         .main_file = "057_unions3.zig",
         .output = "Insect report! Ant alive is: true. Bee visited 17 flowers.",
     },
+    .{
+        .main_file = "058_quiz7.zig",
+        .output = "Archer's Point--2->Bridge--1->Dogwood Grove--3->Cottage--2->East Pond--1->Fox Pond",
+        .hint = "This is the biggest program we've seen yet. But you can do it!"
+    },
 };
 
 /// Check the zig version to make sure it can compile the examples properly.