Revive fork changes for async context

[sosukesuzuki]

#110 partially deleted fork changes for async context by accident.

This patch revives deleted part.

[coderabbitai]

Caution

Review failed

The pull request is closed.

Walkthrough

Updated PromiseOperations.js to store promise reaction context as either a single context or a pair [context, asyncContext] when an async context is present, affecting creation and enqueueing of reactions. Public/exported declarations were also modified.

Changes

Cohort / File(s)	Change Summary
Promise reaction context handling Source/JavaScriptCore/builtins/PromiseOperations.js	Reactions now store either context or [context, asyncContext] based on asyncContext presence; applies to initial and subsequent reaction entries. Adjusted handling for enqueuing/processing reactions. Public/exported declarations altered.

✨ Finishing touches

• 📝 Generate Docstrings

🧪 Generate unit tests

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch revive-async-context

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📥 Commits

Reviewing files that changed from the base of the PR and between a04a318 and 1ad8153.

📒 Files selected for processing (1)

• Source/JavaScriptCore/builtins/PromiseOperations.js (2 hunks)

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