Add header (featuring SearchBar and TabBar)

karaokatalog/ui/static/components/pieces/Header.js

@@ -0,0 +1,8 @@
+import SearchBar from "./SearchBar.js"
+import TabBar from "./TabBar.js"
+
+export default {
+    view() {
+        return m("header", [m(SearchBar), m(TabBar)])
+    },
+}