chore: rebrand rrweb packages to @junify-app scope

[hamaron]

• rename every workspace package, dependency, and import from @Junify to @junify-app
• update docs, manifests, plugin identifiers, and changesets to use the new scope
• fix build scripts and turbo filters to match renamed packages

[coderabbitai]

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✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch chore/rename-to-junify-app

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