[Chrome extension] User-Focused Documentation

**Description**:
As a user of the Chrome Extension, I want simple, step-by-step guides so I can install, explore features, and troubleshoot without needing technical knowledge.

**Acceptance Criteria:**
	•	Clear install guide 
	•	Feature walkthrough with screenshots (profiles, logging, SDK checks)
	•	FAQ & troubleshooting for common issues
	•	Linked from README for easy access