Upgrade Remotion composition engine with cinematic enhancements

- Upgrade Remotion packages to 4.0.441, add transitions/captions/fonts/media
- Add spring-animated image scenes, stat reveals, section titles, hero cards
- Add TikTok-style word-by-word captions with highlight effect
- Add Google Fonts (Space Grotesk) and dynamic duration via calculateMetadata
- Fix Remotion false-positive: check node_modules/ in _remotion_available()
- Add project directory convention, music library, tool naming docs
- Add music transparency to proposal stage, subtitle pipeline to compose stage
- Add README showcase montage and Windows npm troubleshooting note

remotion-composer/package.json

@@ -8,11 +8,15 @@
     "upgrade": "npx remotion upgrade"
   },
   "dependencies": {
-    "@remotion/cli": "4.0.0",
-    "@remotion/player": "4.0.0",
+    "@remotion/captions": "^4.0.441",
+    "@remotion/cli": "^4.0.441",
+    "@remotion/google-fonts": "^4.0.441",
+    "@remotion/media": "^4.0.441",
+    "@remotion/player": "^4.0.441",
+    "@remotion/transitions": "^4.0.441",
     "react": "^18.2.0",
     "react-dom": "^18.2.0",
-    "remotion": "4.0.0"
+    "remotion": "^4.0.441"
   },
   "devDependencies": {
     "@types/react": "^18.2.0",