docs: update CLI Helper tools section path name and add notes

<!-- ELLIPSIS_HIDDEN --> > [!IMPORTANT] > Update CLI helper tool path and add clarification note in `README.md`. > > - **Documentation**: > - Update CLI helper tool example path from `path/to/main.js` to `path/to/config.js` in `README.md`. > - Add note to clarify that `path/to/config.js` should be replaced with the actual ESLint configuration file path, such as `.eslintrc` or `eslint.config.js`. > > ^{This description was created by}[<img alt="Ellipsis" src="https://img.shields.io/badge/Ellipsis-blue?color=175173">](https://www.ellipsis.dev?ref=prettier%2Feslint-config-prettier&utm_source=github&utm_medium=referral)^{for 6ae5cc3c1d088b5802300ec2f0a6b3ee0503164b. You can [customize](https://app.ellipsis.dev/prettier/settings/summaries) this summary. It will automatically update as commits are pushed.} <!-- ELLIPSIS_HIDDEN -->