Added a README and polished the SiriusOS codebase today!

What’s new:

• Wrote a full README.md for the GitHub repo — covers all features, tech stack, and how to run it locally
• Pushed to GitHub, repo now has a proper landing page with badges and a live demo link
• Cleaned up the window manager code — extracted drag logic into a reusable makeDraggable() helper
• Fixed a z-index bug where minimized windows could still intercept mouse events
• Improved the Stargazer app: constellation lines now render in a softer color so individual stars are easier to see

The draggable window system is holding up really well — no flicker, smooth focus management. Next step is adding a File Manager app and a settings panel for theming!