feat(linter): add unicorn/prefer-keyboard-event-key rule

[re-taro]

This PR adds unicorn/prefer-keyboard-event-key rule, issue #684

rule doc
rule source

[Copilot]

Pull request overview

This PR implements the unicorn/prefer-keyboard-event-key linter rule, which enforces the use of the modern KeyboardEvent.key property over the deprecated keyCode, charCode, and which properties. The rule includes auto-fix capabilities that can automatically replace deprecated property accesses with the appropriate key comparisons when used in binary expressions.

Key Changes

• Adds comprehensive rule implementation with support for detecting deprecated properties in direct property access and destructuring patterns
• Implements auto-fix functionality that converts numeric key code comparisons to string key comparisons
• Includes extensive test coverage with 47 failing cases and 20 fix test cases

Reviewed changes

Copilot reviewed 3 out of 4 changed files in this pull request and generated 2 comments.

File	Description
crates/oxc_linter/src/rules/unicorn/prefer_keyboard_event_key.rs	Complete rule implementation with detection logic, auto-fix, and comprehensive test suite
crates/oxc_linter/src/rules.rs	Registers the new rule in the linter's rule registry
crates/oxc_linter/src/snapshots/unicorn_prefer_keyboard_event_key.snap	Test snapshot containing expected diagnostic outputs

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[codspeed-hq]

CodSpeed Performance Report

Merging #16611 will not alter performance

_{Comparing re-taro:feat/prefer-keyboard-event-key (7c241e0) with main (0be98b9)}

Summary

✅ 4 untouched
⏩ 41 skipped¹

Footnotes

1. 41 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

[camc314]

Thanks for working on this! Unfortunately it looks like CI is failing as not all the test cases are passing

[camc314]

Thank you!