chore: Update router links and remove unused pages

src/App.vue

@@ -11,14 +11,14 @@ import HelloWorld from './components/HelloWorld.vue'
       <HelloWorld msg="You did it!" />
 
       <nav>
-        <RouterLink to="/">Home</RouterLink>
-        <RouterLink to="/about">About</RouterLink>
+        <RouterLink :to="{ name: 'IndexPage' }">Home</RouterLink>
+        <RouterLink :to="{ name: 'AboutPage' }">About</RouterLink>
       </nav>
     </div>
   </header>
 
   <nav>
-    <button @click="$router.push({ name: 'About' })">AboutButtonPush</button>
+    <button @click="$router.push({ name: 'AboutPage' })">AboutButtonPush</button>
   </nav>
 
   <RouterView />