Reduce text crawl buffer size

[ibgreen]

Summary

• lower the Star Wars crawl text geometry tessellation to stay under default WebGPU buffer limits
• note the reduced tessellation settings in the example source

Testing

• npx eslint --no-error-on-unmatched-pattern examples/showcase/text-3d/app.ts --ext .ts (fails: monorepo import aliases unresolved in this environment)

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Codex Task