[GOOD FIRST ISSUE] Add real screenshots to README

[youngcoder45]

Replace placeholder screenshots with actual images of the system.

Context:
README currently has placeholder sections for screenshots.

Suggested approach:

1. Boot the distro in a VM
2. Capture:
   • Desktop
   • Installer
3. Upload images to repo
4. Link them in README

Acceptance criteria:

• At least 2 screenshots added
• Images properly displayed in README

Files:

• README.md