[example] initialize tutorial (#1865)

examples/tutorial/README.md

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+# Colossal-AI Tutorial Hands-on
+
+## Introduction
+
+Welcome to the [Colossal-AI](https://github.com/hpcaitech/ColossalAI) tutorial, which has been accepted as official tutorials by top conference [SC](https://sc22.supercomputing.org/), [AAAI](https://aaai.org/Conferences/AAAI-23/), [PPoPP](https://ppopp23.sigplan.org/), etc.
+
+
+[Colossal-AI](https://github.com/hpcaitech/ColossalAI), a unified deep learning system for the big model era, integrates
+many advanced technologies such as multi-dimensional tensor parallelism, sequence parallelism, heterogeneous memory management,
+large-scale optimization, adaptive task scheduling, etc. By using Colossal-AI, we could help users to efficiently and 
+quickly deploy large AI model training and inference, reducing large AI model training budgets and scaling down the labor cost of learning and deployment.
+
+### 🚀 Quick Links
+
+[**Colossal-AI**](https://github.com/hpcaitech/ColossalAI) |
+[**Paper**](https://arxiv.org/abs/2110.14883) | 
+[**Documentation**](https://www.colossalai.org/) | 
+[**Forum**](https://github.com/hpcaitech/ColossalAI/discussions) | 
+[**Slack**](https://join.slack.com/t/colossalaiworkspace/shared_invite/zt-z7b26eeb-CBp7jouvu~r0~lcFzX832w)
+
+
+## Table of Content
+
+ - Multi-dimensional Parallelism
+   - Know the components and sketch of Colossal-AI
+   - Step-by-step from PyTorch to Colossal-AI
+   - Try data/pipeline parallelism and 1D/2D/2.5D/3D tensor parallelism using a unified model
+ - Sequence Parallelism
+   - Try sequence parallelism with BERT
+   - Combination of data/pipeline/sequence parallelism
+   - Faster training and longer sequence length
+ - Auto-Parallelism
+   - Parallelism with normal non-distributed training code
+   - Model tracing + solution solving + runtime communication inserting all in one auto-parallelism system
+   - Try single program, multiple data (SPMD) parallel with auto-parallelism SPMD solver on ResNet50
+ - Large Batch Training Optimization
+   - Comparison of small/large batch size with SGD/LARS optimizer
+   - Acceleration from a larger batch size
+ - Fine-tuning and Serving for OPT from Hugging Face
+   - Try OPT model imported from Hugging Face with Colossal-AI
+   - Fine-tuning OPT with limited hardware using ZeRO, Gemini and parallelism
+   - Deploy the fine-tuned model to inference service
+ - Acceleration of Stable Diffusion
+   - Stable Diffusion with Lightning
+   - Try Lightning Colossal-AI strategy to optimize memory and accelerate speed
+      
+
+## Discussion
+
+Discussion about the [Colossal-AI](https://github.com/hpcaitech/ColossalAI) project is always welcomed! We would love to exchange ideas with the community to better help this project grow.
+If you think there is a need to discuss anything, you may jump to our [Slack](https://join.slack.com/t/colossalaiworkspace/shared_invite/zt-z7b26eeb-CBp7jouvu~r0~lcFzX832w).
+
+If you encounter any problem while running these tutorials, you may want to raise an [issue](https://github.com/hpcaitech/ColossalAI/issues/new/choose) in this repository.
+