chore(i18n): partial Simplified Chinese localization (draft) (#143)

* Chinese i18n

* fix(i18n): corrected mislabeled language name from "中国人" to "简体中文"

* chore(i18n): initial Simplified Chinese translation

src/components/LocaleSwitcher.tsx

@@ -46,7 +46,7 @@ export default function LocaleSwitcher() {
         },
         {
             value: 'zh-CN',
-            label: '中国人'
+            label: '简体中文'
         }
       ]}
     />