Added readme, example .env and removed ipynb

.env.example

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+# Copy this file to .env and replace placeholder values with your actual settings.
+
+OPENAI_API_KEY=
+NEO4J_URL=
+NEO4J_USERNAME=
+NEO4J_PASSWORD=

.gitignore

@@ -1,2 +1,3 @@
 graphrag/
-.env
+.env
+.ipynb

kg_builder/README.md

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+# Knowledge Graph Builder
+
+## Description
+This project builds and queries knowledge graphs from Wikipedia articles using the LangChain library and OpenAI's language models, storing data in a Neo4j database.
+
+## Features
+- **Knowledge Graph Construction**: Build graphs from Wikipedia articles.
+- **Graph-Based Querying**: Utilize graphs to answer queries with a Graph Cypher QA Chain.
+- **Environment Flexibility**: Manages dependencies and environment variables through `.env` files.
+
+## Prerequisites
+- Python 3.8+
+- pip and virtualenv (optional)
+- Access to a Neo4j database
+- OpenAI API key
+
+## Installation
+1. **Clone the repository**:
+    ```bash
+    git clone https://yourrepository.git
+    cd your_project_directory
+    ```
+2. **Set up a Python virtual environment (optional):**
+    ```bash
+    python -m venv venv
+    source venv/bin/activate  # On Windows use `venv\Scripts\activate`
+    ```
+3. **Install the required packages:**
+   ```bash
+   pip install -r requirements.txt
+   ```
+4. **Set up your environment variables:**
+   - Copy the `.env.example` to `.env`:
+     ```bash
+     cp .env.example .env
+     ```
+   - Edit the `.env` file to include your specific configurations such as `OPENAI_API_KEY`, `NEO4J_URL`, `NEO4J_USERNAME`, and `NEO4J_PASSWORD`.
+
+## Usage
+
+1. **Run the main script:**
+    ```bash
+    python main.py
+    ```
+
+## Contributing
+
+Contributions are welcome! To contribute:
+1. Fork the Project
+2. Create your Feature Branch (`git checkout -b feature/AmazingFeature`)
+3. Commit your Changes (`git commit -m 'Add some AmazingFeature'`)
+4. Push to the Branch (`git push origin feature/AmazingFeature`)
+5. Open a Pull Request