[FEATURE]: Lighthouse CLI Support for Authenticated Pages

[helabenkhalfallah]

✨ Description

This feature enhances the Lighthouse CLI to handle authentication for web pages that require users to log in.

🚀 Motivation

Many web applications have critical pages behind login screens. Currently, the Lighthouse CLI cannot easily audit these pages, leading to incomplete performance assessments.

📝 Proposed Solution

Implement multiple authentication mechanisms in the Lighthouse CLI to cater to different authentication flows:

• --auth-header: Allow users to provide an authentication header (e.g., Authorization: Bearer ) as a command-line argument.
• --auth-cookie: Enable users to specify authentication cookies to be included in the requests.
• --auth-script: Support a custom script (e.g., a Puppeteer script) that handles the authentication flow programmatically.

🔗 Relevant Links (if any)

• https://github.com/GoogleChrome/lighthouse-ci
• https://pptr.dev/