Support ESLint 10: widen peer range and fix eslint-comments in flat recommended config

[alaingoga]

Minimum changes needed to support ESlint 10 in github-ui. As part of https://github.com/github/web-systems/issues/5207.

What changes are proposed: (they were tested as local directories on github-ui locally)

1. Expanded supported ESLint peer range
   Changed peerDependencies from ^8 || ^9 to ^8 || ^9 || ^10 in:
   package.json:62
   package-lock.json:49
2. Fixed flat recommended plugin wiring for compatibility
   Wrapped eslint-plugin-eslint-comments with @eslint/compat in:
   recommended.js:20

[Copilot]

Pull request overview

This PR makes minimal compatibility updates so eslint-plugin-github can be consumed in projects upgrading to ESLint 10, while keeping existing ESLint 8/9 support. It widens the peer dependency range and adjusts the flat “recommended” config’s plugin wiring to work under ESLint 10.

Changes:

• Expand eslint peer dependency range to include ^10.
• Update the lockfile to reflect the new peer dependency range.
• Fix flat recommended config plugin registration by wrapping eslint-plugin-eslint-comments with @eslint/compat’s fixupPluginRules.

Show a summary per file

File	Description
package.json	Widens eslint peer dependency range to `^8
package-lock.json	Updates root package peer dependency entry to match the widened ESLint range.
lib/configs/flat/recommended.js	Wraps eslint-comments plugin with fixupPluginRules for flat-config compatibility.

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• Files reviewed: 2/3 changed files
• Comments generated: 0
• Review effort level: Low