Add GitHub Actions workflow to build and release whisper-stream binaries

[newbeelearn]

Motivation

• Provide an automated release flow that builds native whisper-stream binaries for Linux and macOS and publishes them as a GitHub release.

Description

• Add stream-release.yml GitHub Actions workflow with a manual workflow_dispatch trigger that accepts tag and prerelease inputs.
• Build matrix targets ubuntu-latest and macos-latest, install platform dependencies, run cmake to configure and build the whisper-stream target in Release mode.
• Collect the compiled binary into a dist directory named whisper-stream-<os>-<arch>, upload artifacts using actions/upload-artifact@v4, and create a GitHub release with softprops/action-gh-release@v2 attaching the binaries.
• Fail-fast is disabled for matrix builds and the release step requires matching uploaded files (fail_on_unmatched_files: true).

Testing

• No automated tests were executed as part of this PR; the new workflow itself will perform compilation and artifact upload when manually triggered.

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Codex Task