fix perf in json parsing logic

[mikekono]

No description provided.

[Copilot]

Pull Request Overview

Improves performance in JSON parsing logic by utilizing modern browser features and optimizing regular expression patterns for handling BigInt values in JSON serialization/deserialization.

• Updates JSON parsing logic to use native JSON.rawJSON when available (Node 20.12+, Chrome 114+)
• Replaces complex regex patterns with more efficient string/number matching
• Adds noise value handling to prevent conflicts with the custom BigInt format

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
src/core/json.ts	Refactored JSON serialization/parsing logic with performance optimizations and modern API support
jest.config.mjs	Added transform configurations for Jest test environments

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[Copilot]

When replacer is an array, the logic is inverted. According to JSON.stringify spec, when replacer is an array, only properties with keys included in the array should be serialized. Currently, it returns the value when the key is included but also returns the value unconditionally at the end, making the array check ineffective.

[Copilot]

When replacer is an array, the logic is inverted. According to JSON.stringify spec, when replacer is an array, only properties with keys included in the array should be serialized. Currently, it returns the value when the key is included but also returns the value unconditionally at the end, making the array check ineffective.