Make collapsed playground tabs more compact

Make collapsed playground tabs more compact 

We have a lot of steps creating a lot of tabs by now. This makes them visually a 
lot more compact without a full redesign. 

Makes it a bit harder to read and less modern looking, but I think usability was 
a bit bad with the wide tabs. 

**Before:** 


![image](https://github.com/facebook/react-forget/assets/11849/a87c8f7e-d60c-43c1-aaea-1a1f77e082d0) 

**After:** 


![image](https://github.com/facebook/react-forget/assets/11849/227ebf1e-055f-439a-bfc9-e69bae091f6a)

compiler/apps/playground/components/TabbedWindow.tsx

@@ -78,7 +78,7 @@ function TabbedWindowItem({
           {tabs.get(name) ?? <div>No output for {name}</div>}
         </div>
       ) : (
-        <div className="relative items-center h-full px-4 py-8 align-middle border-r border-grey-200">
+        <div className="relative items-center h-full px-1 py-8 align-middle border-r border-grey-200">
           <button
             style={{ transform: "rotate(90deg) translate(-50%)" }}
             onClick={toggleTabs}