Create README.md for PythonJigsaw01 project

Added a README file with project details, features, requirements, installation, and usage instructions.

README.md

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+# PythonJigsaw01 🎯
+
+A simple jigsaw puzzle game built with Python, PyQt5, and Pillow.  
+Load any image (below a certain size), split it into pieces, and manually assemble them - pieces snap together and cluster when placed near each other.
+
+---
+
+## Features
+
+- Load a custom image and divide it into a configurable number of pieces.  
+- Pieces are shuffled randomly on the canvas.  
+- Drag and drop pieces with the mouse.  
+- Pieces “snap” to neighbors when aligned - forming clusters that move together.  
+- Settings persist via a JSON config (e.g., background color, puzzle size).  
+- Supports different image & puzzle sizes (within reasonable limits).  
+
+---
+
+## Demo / Screenshots
+
+<img width="1920" height="1030" alt="Screenshot 2025-12-06 164542" src="https://github.com/user-attachments/assets/776d23d7-77e0-46ac-8dad-a9fcd2506984" />
+
+---
+
+## Requirements
+
+- Python 3.x  
+- [PyQt5](https://pypi.org/project/PyQt5/)  
+- [Pillow (PIL)](https://pypi.org/project/Pillow/)  
+
+---
+
+## Installation
+
+```bash
+git clone https://github.com/serialexperiments0815/PythonJigsaw01.git
+cd PythonJigsaw01
+pip install PyQt5 Pillow
+```
+
+## Usage
+```bash
+python main.py
+```
+---