feat: add marketing video mode and Remotion marketing video project

Add debug-only Marketing Video Mode toggle that enables hands-free
screen recording across the app: auto-scrolling Featured Trips carousel,
auto-filling trip wizard, smooth trip detail scrolling via CADisplayLink,
and trip options auto-sort with scroll.

Add Remotion marketing video project with 6 scene compositions using
image sequences extracted from screen recordings, varied phone entrance
animations, and deduped frames for smooth playback.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

marketing-videos/.gitignore

@@ -0,0 +1,4 @@
+node_modules/
+dist/
+out/
+.DS_Store

marketing-videos/package.json

@@ -0,0 +1,21 @@
+{
+  "name": "sportstime-marketing-videos",
+  "version": "1.0.0",
+  "private": true,
+  "scripts": {
+    "start": "npx remotion studio",
+    "render": "npx remotion render app-store-preview out/AppStorePreview.mp4",
+    "build": "npx remotion render app-store-preview out/AppStorePreview.mp4"
+  },
+  "dependencies": {
+    "@remotion/cli": "^4.0.421",
+    "@remotion/transitions": "^4.0.421",
+    "react": "^18.3.1",
+    "react-dom": "^18.3.1",
+    "remotion": "^4.0.421"
+  },
+  "devDependencies": {
+    "@types/react": "^18.3.3",
+    "typescript": "^5.5.0"
+  }
+}