feat: integrate i18next for internationalization support (#65)

* feat: integrate i18next for internationalization support

- Added i18next and react-i18next dependencies for localization.
- Updated various components to utilize translation functions for user-facing text.
- Enhanced user experience by providing multilingual support across the application.

* feat: improve i18n implementation with better translations and accessibility

- Add proper i18n keys for language switcher tooltips and aria-labels
- Replace hardcoded Chinese console error messages with i18n keys
- Add missing translation keys for new UI elements
- Improve accessibility with proper aria-label attributes

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Co-authored-by: Jason <farion1231@gmail.com>

src/components/AddProviderModal.tsx

@@ -1,4 +1,5 @@
 import React from "react";
+import { useTranslation } from "react-i18next";
 import { Provider } from "../types";
 import { AppType } from "../lib/tauri-api";
 import ProviderForm from "./ProviderForm";
@@ -14,11 +15,13 @@ const AddProviderModal: React.FC<AddProviderModalProps> = ({
   onAdd,
   onClose,
 }) => {
+  const { t } = useTranslation();
+
   return (
     <ProviderForm
       appType={appType}
-      title="添加新供应商"
-      submitText="添加"
+      title={t("provider.addNewProvider")}
+      submitText={t("common.add")}
       showPresets={true}
       onSubmit={onAdd}
       onClose={onClose}