Update homepage and multilingual code configuration

i18n/de/code.json

@@ -276,6 +276,9 @@
   "Industry Leading Open Source Energy Management System": {
     "message": "Branchenführendes Open Source Energy Management System"
   },
+  "Nearly a thousand project cases":{
+    "message":"Fast tausend Projektfälle"
+  },
   "Commitment to permanent open source": {
     "message": "Engagement für dauerhafte Open Source"
   },

i18n/zh-Hans/code.json

@@ -276,7 +276,10 @@
   "Industry Leading Open Source Energy Management System": {
     "message": "行业领先的开源能源管理系统"
   },
-  "Commitment to permanent open source": {
+  "Nearly a thousand project cases":{
+    "message":"近千个项目案例"
+  },
+  "Commitment to permanent open source":{
     "message": "承诺永久开源"
   },
   "Free technical support within QQ and WeChat groups": {

src/pages/index.js

@@ -15,6 +15,7 @@ function HomepageHeader() {
       <div className="container">
         <h1 className="hero__title">{siteConfig.title}</h1>
         <p className="hero__subtitle"><Translate>Industry Leading Open Source Energy Management System</Translate></p>
+        <h3><Translate>Nearly a thousand project cases</Translate></h3>
         <h3><Translate>Commitment to permanent open source</Translate></h3>
         <h3><Translate>Free technical support within QQ and WeChat groups</Translate></h3>
         <h3><Translate>Keep updated, 1 minor version per month, 1 major version per year</Translate></h3>