Add Sfx

This automates the process of adding sound effects to Remotion's @remotion/sfx package, handling all the steps from repository setup to documentation. It walks through adding WAV files to remotion.media, creating camelCase exports, generating MDX documentation pages with audio players and metadata, and updating sidebars and tables of contents. The workflow is pretty specific to Remotion's infrastructure, requiring CC0 licensed files normalized to -3dB and coordination across multiple repositories. It's clearly designed for maintainers who regularly contribute sound effects to the library rather than one-off additions. The attention to naming conventions and version management suggests this comes from real pain points in keeping the package consistent.