Add Chinese localization (#471)

* add zh-CN.yml for chinese

* The files appear to use CRLF line endings instead of LF (Unix-style).

* Add the missing entries to the zh-CN.yml file and include the Simplified Chinese option.

* Fix grammatical errors

Signed-off-by: jiang123574 <jiang123574@163.com>

* Update languages_helper.rb

Signed-off-by: jiang123574 <jiang123574@163.com>

* Update 'SimpleFin' to 'SimpleFIN' in translations

Signed-off-by: jiang123574 <jiang123574@163.com>

* update zh-CN.yml

* update zh-CN.yml

* add new zh-CN.yml

* CodeRabbit comments

* Enable Banking i18n

---------

Signed-off-by: jiang123574 <jiang123574@163.com>
Co-authored-by: Juan José Mata <juanjo.mata@gmail.com>

config/locales/views/shared/zh-CN.yml

@@ -0,0 +1,18 @@
+---
+zh-CN:
+  shared:
+    confirm_modal:
+      accept: 确认
+      body_html: "<p>此操作不可撤销</p>"
+      cancel: 取消
+      title: 确定要执行此操作？
+    money_field:
+      label: 金额
+    syncing_notice:
+      syncing: 账户数据同步中...
+    transaction_tabs:
+      expense: 支出
+      income: 收入
+      transfer: 转账
+    trend_change:
+      no_change: 无变化