feat: add Remotion video project + SquareMCP brand compositions

- Scaffold videos/remotion-demo with Remotion 4.0.459
- SquareMCPLinkedIn: 90s 1080×1080 LinkedIn explainer (6 scenes, spring animations)
- SquareMCPHeroLoop: 30s 1920×1080 seamless hero loop (node network + MCP layer + logo)
- Brand tokens from squaremcp-logo.svg (#0E63F6/#7DB6FF), Inter via @remotion/google-fonts
- Both compositions rendered to out/ and type-checked clean
- Update .gitignore to exclude videos/remotion-demo/node_modules and out/

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

videos/remotion-demo/README.md

@@ -0,0 +1,54 @@
+# Remotion video
+
+<p align="center">
+  <a href="https://github.com/remotion-dev/logo">
+    <picture>
+      <source media="(prefers-color-scheme: dark)" srcset="https://github.com/remotion-dev/logo/raw/main/animated-logo-banner-dark.apng">
+      <img alt="Animated Remotion Logo" src="https://github.com/remotion-dev/logo/raw/main/animated-logo-banner-light.gif">
+    </picture>
+  </a>
+</p>
+
+Welcome to your Remotion project!
+
+## Commands
+
+**Install Dependencies**
+
+```console
+npm i
+```
+
+**Start Preview**
+
+```console
+npm run dev
+```
+
+**Render video**
+
+```console
+npx remotion render
+```
+
+**Upgrade Remotion**
+
+```console
+npx remotion upgrade
+```
+
+## Docs
+
+Get started with Remotion by reading the [fundamentals page](https://www.remotion.dev/docs/the-fundamentals).
+
+## Help
+
+We provide help on our [Discord server](https://discord.gg/6VzzNDwUwV).
+
+## Issues
+
+Found an issue with Remotion? [File an issue here](https://github.com/remotion-dev/remotion/issues/new).
+
+## License
+
+Note that for some entities a company license is needed. [Read the terms here](https://github.com/remotion-dev/remotion/blob/main/LICENSE.md).