adding README

Author: PB2204

README.md

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+Creating a well-structured README.md file is essential for your project as it provides a clear overview of your project's purpose, usage, and instructions for potential contributors. Here's a sample README.md template for your image fetching library project:
+
+```markdown
+# My Image Fetcher Library
+
+My Image Fetcher Library is a C++ library that allows you to search for images on Google and download them to your local system. It provides a simple API for querying Google's Custom Search API and saving image results.
+
+## Features
+
+- Search for images on Google using keywords.
+- Download and save images to a specified folder.
+- Easily integrate image searching and downloading into your C++ applications.
+
+## Prerequisites
+
+Before using the library, you'll need the following:
+
+- CMake (for building the project)
+- C++ Compiler (e.g., GCC)
+- cURL library (for making HTTP requests)
+
+## Getting Started
+
+### Installation
+
+1. Clone this repository to your local machine:
+
+   ```shell
+   git clone https://github.com/pb2204/cpp-google-image-fetcher.git
+   cd my-image-fetcher-library
+   ```
+
+2. Build the library using CMake:
+
+   ```shell
+   mkdir build
+   cd build
+   cmake ..
+   make
+   ```
+
+### Usage
+
+1. Include the library in your C++ project:
+
+   ```cpp
+   #include "google_image_fetcher.h"
+   ```
+
+2. Create an instance of the `GoogleImageFetcher` class:
+
+   ```cpp
+   GoogleImageFetcher imageFetcher;
+   ```
+
+3. Use the `fetchImages` method to search and download images:
+
+   ```cpp
+   imageFetcher.fetchImages("cat", "downloaded_images");
+   ```
+
+   This example searches for images of cats and saves them to the "downloaded_images" folder.
+
+## Example
+
+You can find a complete example of using the library in the [examples](/examples) directory.
+
+## Contributing
+
+Contributions are welcome! If you'd like to contribute to this project, please follow these steps:
+
+1. Fork the repository.
+2. Create a new branch for your feature or bug fix: `git checkout -b feature/your-feature-name`
+3. Make your changes and commit them: `git commit -m "Add your changes"`
+4. Push to your branch: `git push origin feature/your-feature-name`
+5. Open a pull request on this repository.
+
+Please review the [Contributing Guidelines](CONTRIBUTING.md) for more details.
+
+## License
+
+This project is licensed under the MIT License - see the [LICENSE](LICENSE) file for details.
+
+## Acknowledgments
+
+- Thanks to the creators of cURL for the powerful HTTP request library.
+- Inspiration from other image-fetching libraries and APIs.
+
+## Contact
+
+If you have any questions, suggestions, or feedback, feel free to reach out to [Pabitra Banerjee](mailto:[email protected]).
+
+Happy coding!
+```