Track ESLint 10 upgrade once eslint-plugin-import supports it

[HDauven]

Context

We are currently pinned to ESLint 9 because eslint-plugin-import support for ESLint 10 is not ready for this repo setup.

Goal

Upgrade this config package to ESLint 10 as soon as eslint-plugin-import is compatible and stable for our usage.

Trigger

• eslint-plugin-import publishes support for ESLint 10.

Scope

• Bump eslint and related toolchain dependencies to ESLint 10-compatible versions.
• Re-run npm run check and validate rule output.
• Publish a release with changelog notes about ESLint 10 support.

Notes

• Keep this blocked until plugin compatibility is confirmed in CI, not only from peer ranges.