Create README.md

Added initial README with project details and roadmap.

Author: cuijh26

README.md

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+<h1 align='center'>WAM-Flow: Parallel Coarse-to-Fine Motion Planning via Discrete Flow Matching for Autonomous Driving</h1>
+<div align='center'>
+    <a href='https://github.com/YoucanBaby' target='_blank'>Yifang Xu</a><sup>1*</sup>&emsp;
+    <a href='https://cuijh26.github.io/' target='_blank'>Jiahao Cui</a><sup>1*</sup>&emsp;
+    <a href='https://github.com/fudan-generative-vision/WAM-Flow' target='_blank'>Feipeng Cai</a><sup>2*</sup>&emsp;
+    <a href='https://github.com/SSSSSSuger' target='_blank'>Zhihao Zhu</a><sup>1</sup>&emsp;
+    <a href='https://github.com/NinoNeumann' target='_blank'>Hanlin Shang</a><sup>1</sup>&emsp;
+    <a href='https://github.com/isan089' target='_blank'>Shan Luan</a><sup>1</sup>&emsp;
+</div>
+<div align='center'>
+    <a href='https://github.com/xumingw' target='_blank'>Mingwang Xu</a><sup>1</sup>&emsp;
+    <a href='https://github.com/fudan-generative-vision/WAM-Flow' target='_blank'>Neng Zhang</a><sup>2</sup>&emsp;
+    <a href='https://github.com/fudan-generative-vision/WAM-Flow' target='_blank'>Yaoyi Li</a><sup>2</sup>&emsp;
+    <a href='https://github.com/fudan-generative-vision/WAM-Flow‘ target='_blank'>Jia Cai</a><sup>2</sup>&emsp;
+    <a href='https://sites.google.com/site/zhusiyucs/home' target='_blank'>Siyu Zhu</a><sup>1</sup>&emsp;
+</div>
+
+<div align='center'>
+    <sup>1</sup>Fudan University&emsp; <sup>2</sup>Yinwang Intelligent Technology Co., Ltd&emsp;
+</div>
+
+## 🔧️ Framework
+![abstract](assets/framework_1.jpg)
+![framework](assets/framework_2.jpg)
+
+## 📅️ Roadmap
+
+| Status | Milestone                                                                                             |    ETA     |
+| :----: | :---------------------------------------------------------------------------------------------------- | :--------: |
+|   🚀   | **[Inference source code meet everyone on GitHub](https://github.com/fudan-generative-vision/WAM-Flow)** | TBD        |
+|   🚀   | **[Pretrained models on Huggingface](https://huggingface.co/fudan-generative-ai/WAM-Flow)**              | TBD        |
+|   🚀   | **[Releasing the training scripts](#training)**                                                          | TBD        |