🌐 Add i18n tool chain and landing page translation to simplified chinese

lang/en-US.json

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+{
+  "brandName": "Solsynth",
+  "brandNameFormal": "Solsynth LLC",
+  "indexIntroduce": "An energetic software company that create wonderful software which everyone love.",
+  "indexProductListHint": "See some of our products just there",
+  "indexActivities": "Activities",
+  "indexActivitiesCaption": "Keep in touch,\nand learn what we doing recently.",
+  "indexActivitiesHint": "See some posts in our realm just here"
+}

lang/zh-CN.json

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+{
+  "brandName": "索尔辛茨",
+  "brandNameFormal": "索尔辛茨实业有限公司",
+  "indexIntroduce": "一家充满活力的软件公司，创造了人人喜爱的精彩软件。",
+  "indexProductListHint": "在这里看看我们的一些产品",
+  "indexActivities": "动态",
+  "indexActivitiesCaption": "开发软件，闭门造车是大忌，了解我们最近在做什么。",
+  "indexActivitiesHint": "看看我们领域中的一些帖子"
+}