Add artist <section>

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

@@ -0,0 +1,14 @@
+import Song from "./Song.js"
+
+export default {
+    view: function (vnode) {
+        const { artist, songs } = vnode.attrs
+        return m(
+            "section.artist",
+            [
+                m("h2", artist),
+                songs.map(song => m(Song, { song })),
+            ],
+        )
+    },
+}