chore: release 0.16.0

[Project516]

What

Bumps every package to 0.16.0, the *_VERSION constants that pin published versions (packages/ffmpeg/src/const.ts, the website playground, apps/vanilla-app/download-assets.js), the CDN URLs in the usage docs, and turns the Unreleased changelog section into 0.16.0.

Why

0.15.0 can crash on any command whose last argument is an option with no value, because the core did not end argv with NULL (#70). The yt-dlp-wasm app hits this. That fix needs a release.

Master also has the upstream batch 1 backport (#72). It adds writeFile(..., { transfer: false }) and file path support for coreURL/wasmURL in Node.js. That is new public API, so this is a minor bump, as 0.15.0 was. #71 only touched the website, the example apps and the FAQ.

The changelog gains an entry for #70, which had none.

Testing

CI on this PR. release.yml checks that every package version and *_VERSION constant matches the tag before it publishes. After merge, the tag v0.16.0 on the merge commit runs release.yml, which publishes to npm and creates the GitHub release.

[coderabbitai]

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📥 Commits

Reviewing files that changed from the base of the PR and between a221727 and d4dd950.

📒 Files selected for processing (10)

• CHANGELOG.md
• apps/vanilla-app/download-assets.js
• apps/website/docs/getting-started/usage.md
• apps/website/src/components/Playground/const.ts
• packages/core-mt/package.json
• packages/core/package.json
• packages/ffmpeg/package.json
• packages/ffmpeg/src/const.ts
• packages/types/package.json
• packages/util/package.json

• Autopilot · Keep fixing CodeRabbit findings and required CI, and resolving merge conflicts

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[project516-review-bot]

This PR bumps all packages from 0.15.0 to 0.16.0 for release. It updates package.json versions, the CORE_VERSION constants in ffmpeg/src/const.ts and the website playground, the vanilla app's download script, CDN URLs in the usage docs, and converts the Unreleased changelog section to 0.16.0 with an entry for the argv NULL-termination fix (#70). All version references are consistent across the 10 modified files.

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_{review-bot, model nvidia/nemotron-3-ultra-550b-a55b:free, verdict approve}