[Docs] Add docs contents at README.md (#3083)

Add docs contents at README.md to easily find documents.
Issue: #2664 

![image](https://github.com/open-mmlab/mmsegmentation/assets/50650583/0763e108-f095-44d1-8e2a-ba2e83f02625)

![image](https://github.com/open-mmlab/mmsegmentation/assets/50650583/088e0945-55b4-4d3f-97bb-02e39dfafb5e)

![image](https://github.com/open-mmlab/mmsegmentation/assets/50650583/109e0320-d6a9-405f-b169-87acb5a0f94d)

![image](https://github.com/open-mmlab/mmsegmentation/assets/50650583/d1d72bde-40c0-451a-be6e-010f1f2d193b)

README.md

@@ -110,6 +110,60 @@ A Colab tutorial is also provided. You may preview the notebook [here](demo/MMSe
 
 To migrate from MMSegmentation 0.x, please refer to [migration](docs/en/migration).
 
+## Tutorial
+
+<details>
+<summary>Get Started</summary>
+
+- [MMSeg overview](docs/en/overview.md)
+- [MMSeg Installation](docs/en/get_started.md)
+- [FAQ](docs/en/notes/faq.md)
+
+</details>
+
+<details>
+<summary>MMSeg Basic Tutorial</summary>
+
+- [Tutorial 1: Learn about Configs](docs/en/user_guides/1_config.md)
+- [Tutorial 2: Prepare datasets](docs/en/user_guides/2_dataset_prepare.md)
+- [Tutorial 3: Inference with existing models](docs/en/user_guides/3_inference.md)
+- [Tutorial 4: Train and test with existing models](docs/en/user_guides/4_train_test.md)
+- [Tutorial 5: Model deployment](docs/en/user_guides/5_deployment.md)
+- [Useful Tools](docs/en/user_guides/useful_tools.md)
+- [Feature Map Visualization](docs/en/user_guides/visualization_feature_map.md)
+- [Visualization](docs/en/user_guides/visualization.md)
+
+</details>
+
+<details>
+<summary>MMSeg Detail Tutorial</summary>
+
+- [MMSeg Dataset](docs/en/advanced_guides/datasets.md)
+- [MMSeg Models](docs/en/advanced_guides/models.md)
+- [MMSeg Dataset Structures](docs/en/advanced_guides/structures.md)
+- [MMSeg Data Transforms](docs/en/advanced_guides/transforms.md)
+- [MMSeg Dataflow](docs/en/advanced_guides/data_flow.md)
+- [MMSeg Training Engine](docs/en/advanced_guides/engine.md)
+- [MMSeg Evaluation](docs/en/advanced_guides/evaluation.md)
+
+</details>
+
+<details>
+<summary>MMSeg Development Tutorial</summary>
+
+- [Add New Datasets](docs/en/advanced_guides/add_datasets.md)
+- [Add New Metrics](docs/en/advanced_guides/add_metrics.md)
+- [Add New Modules](docs/en/advanced_guides/add_models.md)
+- [Add New Data Transforms](docs/en/advanced_guides/add_transforms.md)
+- [Customize Runtime Settings](docs/en/advanced_guides/customize_runtime.md)
+- [Training Tricks](docs/en/advanced_guides/training_tricks.md)
+- [Contribute code to MMSeg](.github/CONTRIBUTING.md)
+- [Contribute a standard dataset in projects](docs/zh_cn/advanced_guides/contribute_dataset.md)
+- [NPU (HUAWEI Ascend)](docs/en/device/npu.md)
+- [0.x → 1.x migration](docs/en/migration/interface.md)，[0.x → 1.x package](docs/en/migration/package.md)
+
+</details>
+
 ## Benchmark and model zoo
 
 Results and models are available in the [model zoo](docs/en/model_zoo.md).

README_zh-CN.md

@@ -104,6 +104,60 @@ MMSegmentation v1.x 在 0.x 版本的基础上有了显著的提升，提供了
 
 若需要将 0.x 版本的代码迁移至新版，请参考[迁移文档](docs/zh_cn/migration)。
 
+## 教程文档
+
+<details>
+<summary>开启 MMSeg 之旅</summary>
+
+- [MMSeg 概述](docs/zh_cn/overview.md)
+- [安装和验证](docs/zh_cn/get_started.md)
+- [常见问题解答](docs/zh_cn/notes/faq.md)
+
+</details>
+
+<details>
+<summary>MMSeg 快速入门教程</summary>
+
+- [教程1：了解配置文件](docs/zh_cn/user_guides/1_config.md)
+- [教程2：准备数据集](docs/zh_cn/user_guides/2_dataset_prepare.md)
+- [教程3：使用预训练模型推理](docs/zh_cn/user_guides/3_inference.md)
+- [教程4：使用现有模型进行训练和测试](docs/zh_cn/user_guides/4_train_test.md)
+- [教程5：模型部署](docs/zh_cn/user_guides/5_deployment.md)
+- [常用工具](docs/zh_cn/user_guides/useful_tools.md)
+- [特征图可视化](docs/zh_cn/user_guides/visualization_feature_map.md)
+- [可视化](docs/zh_cn/user_guides/visualization.md)
+
+</details>
+
+<details>
+<summary>MMSeg 细节介绍</summary>
+
+- [MMSeg 数据集介绍](docs/zh_cn/advanced_guides/datasets.md)
+- [MMSeg 模型介绍](docs/zh_cn/advanced_guides/models.md)
+- [MMSeg 数据结构介绍](docs/zh_cn/advanced_guides/structures.md)
+- [MMSeg 数据增强介绍](docs/zh_cn/advanced_guides/transforms.md)
+- [MMSeg 数据流介绍](docs/zh_cn/advanced_guides/data_flow.md)
+- [MMSeg 训练引擎介绍](docs/zh_cn/advanced_guides/engine.md)
+- [MMSeg 模型评测介绍](docs/zh_cn/advanced_guides/evaluation.md)
+
+</details>
+
+<details>
+<summary>MMSeg 开发教程</summary>
+
+- [新增自定义数据集](docs/zh_cn/advanced_guides/add_datasets.md)
+- [新增评测指标](docs/zh_cn/advanced_guides/add_metrics.md)
+- [新增自定义模型](docs/zh_cn/advanced_guides/add_models.md)
+- [新增自定义数据增强](docs/zh_cn/advanced_guides/add_transforms.md)
+- [自定义运行设定](docs/zh_cn/advanced_guides/customize_runtime.md)
+- [训练技巧](docs/zh_cn/advanced_guides/training_tricks.md)
+- [如何给 MMSeg贡献代码](.github/CONTRIBUTING.md)
+- [在 projects 给 MMSeg 贡献一个标准数据集](docs/zh_cn/advanced_guides/contribute_dataset.md)
+- [NPU (华为 昇腾)](docs/zh_cn/device/npu.md)
+- [0.x → 1.x 迁移文档](docs/zh_cn/migration/interface.md)，[0.x → 1.x 库变更文档](docs/zh_cn/migration/package.md)
+
+</details>
+
 ## 基准测试和模型库
 
 测试结果和模型可以在[模型库](docs/zh_cn/model_zoo.md)中找到。