feat(i18n): 添加国家选择器的多语言翻译

i18n/locales/en-US.json

@@ -43,5 +43,8 @@
     "btn_fetch": "Fetch",
     "btn_clear": "Clear",
     "btn_empty_desc": "No data"
+  },
+  "countryRegion": {
+    "searchPlaceholder": "Please enter the country and region"
   }
 }

i18n/locales/ja-JP.json

@@ -43,5 +43,8 @@
     "btn_fetch": "取得",
     "btn_clear": "クリア",
     "btn_empty_desc": "データなし"
+  },
+  "countryRegion": {
+    "searchPlaceholder": "国と地域を入力してください"
   }
 }

i18n/locales/zh-CN.json

@@ -47,5 +47,8 @@
     "btn_fetch": "拉取",
     "btn_clear": "清空",
     "btn_empty_desc": "暂无数据"
+  },
+  "countryRegion": {
+    "searchPlaceholder": "请输入国家和地区"
   }
 }

i18n/locales/zh-TW.json

@@ -43,5 +43,8 @@
     "btn_fetch": "拉取",
     "btn_clear": "清空",
     "btn_empty_desc": "暫無數據"
+  },
+  "countryRegion": {
+    "searchPlaceholder": "請輸入國家和地區"
   }
 }