add solid-start support

template/apps/<@if(eq(context.project.frontend,"solid-start"))>web/src/routes/[...404].tsx

@@ -0,0 +1,19 @@
+import { Title } from "@solidjs/meta";
+import { HttpStatusCode } from "@solidjs/start";
+
+export default function NotFound() {
+  return (
+    <main>
+      <Title>Not Found</Title>
+      <HttpStatusCode code={404} />
+      <h1>Page Not Found</h1>
+      <p>
+        Visit{" "}
+        <a href="https://start.solidjs.com" target="_blank">
+          start.solidjs.com
+        </a>{" "}
+        to learn how to build SolidStart apps.
+      </p>
+    </main>
+  );
+}