doc: update documentation

README.md

@@ -1,14 +1,45 @@
 # Semi.Avalonia
 
+[![Semi Avalonia](https://img.shields.io/nuget/v/Semi.Avalonia.svg?color=red&style=flat-square)](https://www.nuget.org/packages/Semi.Avalonia/)
+[![Semi Avalonia](https://img.shields.io/nuget/dt/Semi.Avalonia.svg?style=flat-square)](https://www.nuget.org/packages/Semi.Avalonia/)
+
 Avalonia Theme inspired by Semi Design
 
 > Semi.Avalonia is still in very early stage. Please don't use in production.
-> 
-> Dark theme is not designed at all. Please don't use that.
 
-![Cover](./docs/cover.png)
+# How to Use
 
-## Requirement
+## Installation
+```bash
+dotnet add package Semi.Avalonia --version 0.1.0-preview5
+```
+Include Semi Design Styles in application:
 
-Avalonia V11
+```xaml
+<Application.Styles>
+    <StyleInclude Source="avares://Semi.Avalonia/Themes/DarkTheme.axaml" />
+</Application.Styles>
+```
 
+That's all. 
+
+## Version compatibility
+
+|Semi Design Version| Avalonia Version|
+|:---|:---|
+|0.1.0-preview3|11.0-preview4|
+|0.1.0-preview5|11.0-preview5|
+
+## TODO
+* DataValidationErrors
+* FocusAdorner
+* DataGrid
+* ColorPicker
+
+## Screenshot
+
+Light Mode
+![Light](./docs/Light.png)
+
+Dark Mode
+![Dark](./docs/Dark.png)