feat: Add validation for adventure name in CreateNewAdventure component

The code changes include adding validation for the adventure name in the CreateNewAdventure component. If the name is empty, an alert is displayed and the adventure creation is prevented. This enhancement ensures that users provide a name for the adventure before creating it.

src/lib/components/CreateNewAdventure.svelte

@@ -26,6 +26,10 @@
 
   function create() {
     addActivityType();
+    if (newAdventure.name.trim() === "") {
+      alert("Name is required");
+      return;
+    }
     dispatch("create", newAdventure);
     console.log(newAdventure);
   }
@@ -70,6 +74,7 @@
           <input
             type="text"
             id="name"
+            required
             bind:value={newAdventure.name}
             class="input input-bordered w-full max-w-xs"
           />