@remotion/effects: Add white noise effect

[JonnyBurger]

Summary

• Add whiteNoise() to @remotion/effects as a WebGL2 canvas effect.
• Register the subpath export, bundle entry, tests, docs page, interactive demo, and preview assets.
• Closes @remotion/effects: White noise #7819.

Checks

• cd packages/effects && bun test src/test
• bun run build
• bun run formatting

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Project	Deployment	Actions	Updated (UTC)
bugs	Ready	Preview, Comment	May 30, 2026 7:19am
remotion	Ready	Preview, Comment	May 30, 2026 7:19am

[pullfrog]

✅ No new issues found.

Reviewed changes — PR adds a new whiteNoise() canvas effect to @remotion/effects as a WebGL2-backed grayscale noise layer, along with its subpath export, tests, documentation, interactive demo, and preview assets.

• Add whiteNoise() effect — WebGL2 fragment shader blending a random grayscale noise layer over the source, preserving the alpha mask via unpremultiplied mixing
• Register package exports and bundle entry — subpath export in package.json, typesVersions, and bundle.ts
• Add tests — default params, finite validation, range guards for amount, and distinct effectKey coverage
• Add docs and demo — MDX docs page, sidebar entry, table-of-contents card, interactive <Demo> component, and preview still

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