docs: update README.md

add badges

README.md

@@ -1,5 +1,10 @@
 # VSCode Folder Size
 
+[![Marketplace Version](https://vsmarketplacebadge.apphb.com/version/xiaoluoboding.vscode-folder-size.svg)](https://marketplace.visualstudio.com/items?itemName=xiaoluoboding.vscode-folder-size)
+[![Installs](https://vsmarketplacebadge.apphb.com/installs/xiaoluoboding.vscode-folder-size.svg)](https://marketplace.visualstudio.com/items?itemName=xiaoluoboding.vscode-folder-size)
+[![GitHub license](https://img.shields.io/github/license/xiaoluoboding/vscode-folder-size)](https://github.com/xiaoluoboding/vscode-folder-size/blob/master/LICENSE)
+
+
 > Shows the current file | folder size in the status bar for Visual Studio Code.
 
 ## Usage
@@ -20,4 +25,4 @@ The Folders Not Counting, default is: `"node_modules|.git"`
 
 ## License
 
-MIT [@xiaoluoboding](https://github.com/xiaoluoboding)
+MIT [@xiaoluoboding](https://github.com/xiaoluoboding)