add: readme

Author: darya-varabei

README.md

@@ -1 +1,26 @@
 # OpenAIImageClient
+
+A lightweight Swift package for interacting with OpenAI's `gpt-image-1` model to generate or edit images using natural language prompts and image files.
+
+## ✨ Features
+
+- Supports multiple input images (`image[]`) for editing
+- Uses `multipart/form-data` requests to match OpenAI API requirements
+- Returns generated image data in decoded PNG format
+- Compatible with SwiftUI and UIKit
+- Swift Concurrency (`async/await`) support
+
+## 🛠 Requirements
+
+- iOS 15.0+ / macOS 12.0+
+- Swift 5.7+
+- Valid OpenAI API key
+- Network permission enabled
+
+## 📦 Installation
+
+Add to your project via **Swift Package Manager**:
+
+```swift
+.package(url: "https://github.com/darya-varabei/OpenAIImageClient.git", from: "1.0.0")
+