feat: Add Valtown embed support

shared/editor/embeds/Valtown.tsx

@@ -0,0 +1,19 @@
+import * as React from "react";
+import Frame from "../components/Frame";
+import { EmbedProps as Props } from ".";
+
+export default function Valtown(props: Props) {
+  const { matches } = props.attrs;
+  const valId = matches[1];
+
+  return (
+    <Frame
+      {...props}
+      src={`https://www.val.town/embed/${valId}`}
+      title="Valtown"
+      border
+    />
+  );
+}
+
+Valtown.ENABLED = [/^https?:\/\/(?:www.)?val\.town\/(?:v|embed)\/(.*)$/];

shared/editor/embeds/index.tsx

@@ -47,6 +47,7 @@ import Spotify from "./Spotify";
 import Tldraw from "./Tldraw";
 import Trello from "./Trello";
 import Typeform from "./Typeform";
+import Valtown from "./Valtown";
 import Vimeo from "./Vimeo";
 import Whimsical from "./Whimsical";
 import YouTube from "./YouTube";
@@ -384,6 +385,12 @@ const embeds: EmbedDescriptor[] = [
     icon: <Img src="/images/typeform.png" alt="Typeform" />,
     component: Typeform,
   }),
+  new EmbedDescriptor({
+    title: "Valtown",
+    keywords: "code",
+    icon: <Img src="/images/valtown.png" alt="Valtown" />,
+    component: Valtown,
+  }),
   new EmbedDescriptor({
     title: "Vimeo",
     keywords: "video",