RFC: ESLint 9 Migration – Transitioning from JSON Config to config.js

### Description

**Summary**

This RFC proposes migrating the ESLint configuration from the deprecated .eslintrc.* format to the new eslint.config.js format introduced in ESLint 9. Additionally, it outlines handling the removal of .eslintignore in favor of the ignores property inside the configuration file.

**Expected Outcomes**
- Successful Migration to eslint.config.js – Ensures compatibility with ESLint 9.
- Removal of Deprecated Configurations – .eslintrc.* and .eslintignore are replaced with eslint.config.js.
- Consistent and Maintainable Linting Rules – The same linting standards are preserved.

### Related Issues

_No response_

### Questions

No.

### Other

No.

### Checklist

- [x] I have read and understood the [Code of Conduct](https://github.com/stdlib-js/stdlib/blob/develop/CODE_OF_CONDUCT.md).
- [x] Searched for existing issues and pull requests.
- [x] The issue name begins with `RFC:`.