Feature Request: Add Prettier, ESLint, and Formatter Configuration

[abdullah4tech]

Description

To improve code consistency and maintainability, we need to integrate Prettier for automatic formatting and ESLint for enforcing code quality in the backend-starter-cli. This will ensure that all contributors follow a consistent coding style.

Tasks:

• Install Prettier and configure it (.prettierrc).
• Install ESLint and set up a basic configuration (.eslintrc).
• Ensure compatibility with the project’s current stack.
• Add an npm script for formatting ("format": "prettier --write .").
• Add an npm script for linting ("lint": "eslint . --fix").
• Update the README with instructions on using Prettier and ESLint.

Expected Outcome

• Running npm run format should format all code files.
• Running npm run lint should flag and fix linting issues.
• Contributors follow a uniform code style.

Additional Context

This will make the development workflow cleaner and more standardized.