Add README.md (#5)

Author: bad-antics

README.md

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+# 🌐 portal
+
+[![Live](https://img.shields.io/badge/status-live-green?style=flat-square)](https://grug-group420.github.io/portal)
+[![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg?style=flat-square)](https://opensource.org/licenses/MIT)
+
+> The interactive web portal for [grug-group420](https://github.com/grug-group420) — with a live CLI playground.
+
+**🔗 [Visit the Portal →](https://grug-group420.github.io/portal)**
+
+## What's Inside
+
+- **Organization landing page** — overview of all grug-group420 projects
+- **Live CLI playground** — try grugbot420 commands directly in the browser
+- **Project showcase** — descriptions, links, and status for all repos
+
+## Tech Stack
+
+- Vanilla HTML/CSS/JavaScript
+- Zero dependencies
+- Zero build step
+- Hosted via GitHub Pages
+
+## Files
+
+```
+portal/
+├── index.html    # Main page
+├── styles.css    # Styles
+└── app.js        # Playground logic
+```
+
+## Run Locally
+
+```bash
+git clone https://github.com/grug-group420/portal.git
+cd portal
+# Open index.html in your browser, or:
+python3 -m http.server 8000
+# Visit http://localhost:8000
+```
+
+## Part of grug-group420
+
+| Project | Description |
+|---------|-------------|
+| [grugbot420](https://github.com/grug-group420/grugbot420) | Neuromorphic cognitive engine (Julia) |
+| [Bindboss](https://github.com/grug-group420/Bindboss) | Self-extracting executable packer (Go) |
+| [grugbot-server](https://github.com/grug-group420/grugbot-server) | AI CLI assistant (Bun.js) |
+| [grug-cli](https://github.com/grug-group420/grug-cli) | Zero-dep developer toolkit |
+
+---
+
+*grug say: "complexity very very bad" 🪨*