[Pages] update plugin sesion.

Signed-off-by: Eric Wang <skygragon@gmail.com>

Author: skygragon

docs/advanced.md

@@ -9,6 +9,7 @@ title: Advanced Topic
 * [Configuration](#configuration)
 * [Color Theme](#color-theme)
 * [Log Level](#log-level)
+* [Plugins](#plugins)
 
 # Auto login
 
@@ -103,4 +104,12 @@ Of course you can create your own themes if you like, please see `colors` folder
 
 * `-v` to enable debug output.
 * `-vv` to enable trace output.
-	* Will print detailed HTTP requests/responses.
+	* Will print detailed HTTP requests/responses.
+
+# Plugins
+
+You can easily introduce more features by installing other plugins form third parties. Here lists the avaible 3rd party plugins at the moment:
+
+* [leetcode-cli-plugins](https://github.com/skygragon/leetcode-cli-plugins)
+
+Feel free to try out the plugins above. Or you can develope your own plugins to enrich leetcode-cli's functionalities.

docs/commands.md

@@ -120,17 +120,19 @@ Use keyword search and query:
 
 # plugin
 
-Display installed plugins.
+Display installed plugins. To install 3rd party plugins, please check the 'Advanced Tips'.
 
 * `-i` to install new plugin.
-* `-d` to delete existing plugin.
+* `-d` to disable existing plugin.
+* `-e` to enable existing plugin.
+* `-D` to delete existing plugin.
 
 *Example*
 
 	$ leetcode plugin
-	retry                default         Plugin to retry last failed request if AUTO_LOGIN is on.
-	cache                default         Plugin to provide local cache.
-	leetcode             default         Plugin to talk with leetcode APIs.
+	✔ retry                default         Plugin to retry last failed request if AUTO_LOGIN is on.
+	✔ cache                default         Plugin to provide local cache.
+	✔ leetcode             default         Plugin to talk with leetcode APIs.
 
 # show