chore: update eslint-plugin-eslint-comments to v4.6.0 and eslint-plugin-unicorn to v62.0.0

[aladdin-add]

This pull request updates the ESLint configuration to use the latest plugins and best practices, modernizes the codebase with newer JavaScript methods, and updates dependencies for better compatibility and features. The changes focus on improving maintainability and aligning with current ESLint standards.

ESLint Configuration Modernization:

• Refactored eslint.config.ts to use defineConfig from eslint/config and updated the configuration structure for better clarity and maintainability. Now uses the latest @eslint/js, @eslint/markdown, eslint-plugin-unicorn, and @eslint-community/eslint-plugin-eslint-comments plugins directly. [1] [2] [3]
• Updated the base and plugin configuration to use new plugin imports and configuration formats, such as switching from eslint-plugin-markdown to @eslint/markdown, and from pluginN to n. [1] [2]
• Improved TypeScript and JavaScript rule handling by merging recommended configs and extending with Prettier and other plugin recommendations. [1] [2]
• Adjusted rules for markdown files and TypeScript, including disabling strict mode and unused variable rules where appropriate.

Dependency Updates:

• Upgraded major dependencies in package.json, including @eslint-community/eslint-plugin-eslint-comments to v4.6.0, eslint-plugin-unicorn to v62.0.0, and replaced eslint-plugin-markdown with @eslint/markdown. [1] [2]

Code Modernization:

• Updated usage of array sorting in meta-property-ordering.ts and no-identical-tests.ts to use the modern .toSorted() method instead of .sort(), improving code clarity and avoiding mutation. [1] [2]

[aladdin-add]

it's reported by the new eslint-plugin-unicorn.

[Copilot]

Pull request overview

Updates the project’s ESLint setup and related dependencies to newer plugin versions and config patterns, while also modernizing a couple of internal implementations to avoid array mutation.

Changes:

• Bumped ESLint plugin dependencies (notably @eslint-community/eslint-plugin-eslint-comments and eslint-plugin-unicorn) and replaced eslint-plugin-markdown with @eslint/markdown.
• Refactored eslint.config.ts to a newer structure using defineConfig, updated plugin imports, and adjusted markdown handling.
• Switched internal sorting logic in two rules to use non-mutating Array.prototype.toSorted().

Reviewed changes

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

File	Description
package.json	Updates ESLint-related devDependencies, including moving to @eslint/markdown and updating plugin versions.
eslint.config.ts	Modernizes flat config structure, plugin wiring, and markdown processing configuration.
lib/rules/no-identical-tests.ts	Replaces mutating .sort() with .toSorted() when generating cache keys.
lib/rules/meta-property-ordering.ts	Uses .toSorted() to avoid mutating the sorted list of properties.

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[Copilot]

tseslint.configs.recommended is a config array (it was previously iterated over in this file). Passing it as a single element inside extends creates a nested array, which can lead to ESLint ignoring the config or erroring when loading the flat config. Consider expanding it into individual configs (e.g., spreading into the top-level config list, or otherwise ensuring each entry is applied as a flat config object).