feat: add standalone dev release workflow

[mkdir700]

Summary

• move dev release steps into dedicated workflow file
• restore release workflow to production-only jobs

Testing

• pnpm lint
• pnpm test (fails: Failed to resolve import "@remotion/media-parser")

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https://chatgpt.com/codex/tasks/task_e_68c37f3606708331bf7e4fd74c03efa8

[coderabbitai]

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✨ Finishing touches

🧪 Generate unit tests

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch codex/-dev

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