docs: update changelog for v0.2.0

CHANGELOG.md

@@ -0,0 +1,31 @@
+# [Unreleased]
+
+## 🚀 Features
+## 🧰 Fixes and improvements
+
+# v0.2.0 (10/03/2023)
+## 🚀 Features
+### Chat Model & Web Interface
+
+We have introduced a new argument, `--chat-model`, which allows you to specify the model for the chat playground located at http://localhost:8080/playground
+
+To utilize this feature, use the following command in the terminal:
+
+```bash
+tabby serve --device metal --model TabbyML/StarCoder-1B --chat-model TabbyML/Mistral-7B
+```
+
+### ModelScope Model Registry
+
+Mainland Chinese users have been facing challenges accessing Hugging Face due to various reasons. The Tabby team is actively working to address this issue by mirroring models to a hosting provider in mainland China called modelscope.cn.
+
+```bash
+# Download from the Modelscope registry
+TABBY_REGISTRY=modelscope tabby download --model TabbyML/WizardCoder-1B
+```
+
+## 🧰 Fixes and improvements
+
+* Implemented more accurate UTF-8 incremental decoding in the [GitHub pull request](https://github.com/TabbyML/tabby/pull/491).
+* Fixed the stop words implementation by utilizing RegexSet to isolate the stop word group.
+* Improved model downloading logic; now Tabby will attempt to fetch the latest model version if there's a remote change, and the local cache key becomes stale.