Add Remotion promo video project with 7-scene App Store flow

- Create feels-promo Remotion project for promotional videos
- Implement FeelsPromoV1 with scenes matching App Store screenshots:
  - Hero scene with mood tracking
  - Widget + Apple Watch scene
  - Journal notes with photos
  - AI-powered insights with badge
  - Privacy & security features
  - Theme customization
  - Notification styles
- Add screens folder with source assets and flow reference
- Include phone frames, widget, and watch frame assets

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

feels-promo/src/Root.tsx

@@ -0,0 +1,27 @@
+import { Composition } from "remotion";
+import { FeelsPromoV1 } from "./FeelsPromo";
+
+export const RemotionRoot: React.FC = () => {
+  const fps = 30;
+  const sceneDuration = 3.5 * fps; // 3.5 seconds per scene
+  const transitionDuration = Math.round(0.6 * fps); // 0.6 second transitions
+  const outroDuration = Math.round(2.5 * fps);
+
+  // Calculate total duration accounting for transition overlaps
+  // 7 scenes + outro - 7 transitions
+  const totalDuration =
+    sceneDuration * 7 + outroDuration - transitionDuration * 7;
+
+  return (
+    <>
+      <Composition
+        id="FeelsPromoV1"
+        component={FeelsPromoV1}
+        durationInFrames={totalDuration}
+        fps={fps}
+        width={1080}
+        height={1920}
+      />
+    </>
+  );
+};