Update README.md

Author: LinuxSuRen

README.md

@@ -5,6 +5,24 @@ This is a plugin for [Jenkins CLI](https://github.com/jenkins-zh/jenkins-cli/) w
 ```
 jcli config plugin fetch
 jcli config plugin install ishell
+➜  ~ jcli ishell
+interactive Jenkins job shell
+>>> help
+
+Commands:
+  build        trigger current job
+  clear        clear the screen
+  context      switch context between different Jenkins
+  current      show the current Jenkins
+  exit         exit the program
+  help         display help
+  history      show the history of job builds
+  job          set or print current job name
+  search       search all jobs
+  version      show the version of this plugin
+
+
+>>>
 ```
 
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