Add License and README

README.md

-# Dyad
+# dyad
 
-Dyad is a new open-source local AI app builder which is an alternative to v0/Lovable/Bolt.
+Dyad is a local, open-source AI app builder. It's fast, private and fully under your control — like Lovable, v0, or Bolt, but running right on your machine.
+
+![Image](https://github.com/user-attachments/assets/f6c83dfc-6ffd-4d32-93dd-4b9c46d17790)
+
+More info at: [http://dyad.sh/](http://dyad.sh/)
+
+## 🚀 Features
+
+- ⚡️ **Local**: Fast, private and no lock-in.
+- 🛠 **Bring your own keys**: Use your own AI API keys with no vendor lock-in.
+- 🖥️ **Cross-platform**: Easy to run on Mac or Windows.
+
+## 📦 Download
+
+No sign-up required. Just download and go.
+
+### [👉 Download for your platform](https://www.dyad.sh/#download)
+
+## 🎥 Preview
+
+**dyad** is open source (Apache 2.0-licensed).