chore(docs): add custom browser title to storybook

See storybookjs/storybook#6339

.storybook/manager.cjs

@@ -1,4 +1,5 @@
 import { addons } from '@storybook/addons';
+import { STORY_RENDERED } from '@storybook/core-events'
 import { create } from '@storybook/theming';
 
 const theme = create({
@@ -11,3 +12,32 @@ const theme = create({
 addons.setConfig({
   theme
 });
+
+addons.register('TitleAddon', api => {
+  const customTitle = 'Reactstrap';
+  let interval = null;
+  const setTitle = () => {
+    clearTimeout(interval);
+
+    let storyData = null;
+    try {
+        storyData = api.getCurrentStoryData();
+    } catch(e) {}
+
+    let title;
+    if (!storyData) {
+        title = customTitle;
+    } else {
+        title = `${storyData.kind} - ${storyData.name} ⋅ ${customTitle}`
+    }
+
+    if (document.title !== title) {
+        document.title = title;
+    }
+    interval = setTimeout(setTitle, 100);
+  };
+  setTitle();
+  api.on(STORY_RENDERED, story => {
+    setTitle();
+  })
+})