Editor embeds (#680)

- [x] Make deleting an embed easier
- [x] Add document level ability to disable embeds
- [x] Add team level ability to disable embeds
- [x] GitHub
- [x] Numeracy
- [x] Mode Analytics
- [x] Figma
- [x] Airtable
- [x] Vimeo
- [x] RealtimeBoard
- [x] Loom
- [x] Lucidcharts
- [x] Framer
- [x] InVision
- [x] Typeform
- [x] Marvel
- [x] Spotify
- [x] Codepen
- [x] Trello

app/embeds/Spotify.js

@@ -0,0 +1,36 @@
+// @flow
+import * as React from 'react';
+import Frame from './components/Frame';
+
+const URL_REGEX = new RegExp('https?://open.spotify.com/(.*)$');
+
+type Props = {
+  url: string,
+};
+
+export default class Spotify extends React.Component<Props> {
+  static ENABLED = [URL_REGEX];
+
+  get pathname() {
+    try {
+      const parsed = new URL(this.props.url);
+      return parsed.pathname;
+    } catch (err) {
+      return '';
+    }
+  }
+
+  render() {
+    const normalizedPath = this.pathname.replace(/^\/embed/, '/');
+
+    return (
+      <Frame
+        width="300px"
+        height="380px"
+        src={`https://open.spotify.com/embed${normalizedPath}`}
+        title="Spotify Embed"
+        allow="encrypted-media"
+      />
+    );
+  }
+}