add Create a feature component

src/app/hero-detail/hero-detail.html

@@ -0,0 +1 @@
+<p>hero-detail works!</p>

src/app/hero-detail/hero-detail.ts

@@ -0,0 +1,11 @@
+import { Component } from '@angular/core';
+
+@Component({
+  selector: 'app-hero-detail',
+  imports: [],
+  templateUrl: './hero-detail.html',
+  styleUrl: './hero-detail.scss'
+})
+export class HeroDetail {
+
+}