update:english readme and future plan

Author: vastsa

readme.md

@@ -1,5 +1,6 @@
 <div style="text-align: center">
-<h1>文件快递柜-Lite</h1>
+<h1>文件快递柜-轻量</h1>
+<h2>FileCoxBox-Lite</h2>
 <p><em>匿名口令分享文本，文件，像拿快递一样取文件</em></p>
 </div>
 

readme_en.md

@@ -1,5 +1,6 @@
 <div style="text-align: center">
-<h1>File Express Cabinet </h1>
+<h1>File Express Cabinet - Lite</h1>
+<h2>FileCodeBox - Lite</h2>
 <p><em>share text and files with anonymous passwords, and take files like express delivery </em></p>
 </div>