Add README for figures directory

Author: 0-mostafa-rezaee-0

figures/README.md

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+# Figures Directory
+
+This directory contains images and visual assets used in the Batch LLM Inference with Ray Data LLM repository.
+
+## Contents
+
+- `logo.png` - The main logo image for the repository, displayed at the top of the README.md file.
+
+## Usage
+
+The images in this directory are used to enhance the documentation and provide visual elements for the repository. If you want to add new images to the repository, please place them in this directory and update this README accordingly.
+
+## Image Credits
+
+- The logo was created to represent batch inference processing with Ray Data LLM, showing the concept of parallel text processing in a distributed environment.