feat: Optimize i18n keys and remove unused keys, supporting static files in I18nT (#2092)

* feat: packages web i18n

* delete file

* feat:i18n add i18nT

* handle keys

* delete unusedKeys

* fix build

* update dev.md

dev.md

@@ -23,6 +23,65 @@ pnpm dev
 make dev name=app
 ```
 
+## I18N
+### Install i18n-ally Plugin
+
+1. Open the Extensions Marketplace in VSCode, search for and install the `i18n Ally` plugin.
+
+### Code Optimization Examples
+#### Fetch Specific Namespace Translations in `getServerSideProps`
+
+```typescript
+// pages/yourPage.tsx
+export async function getServerSideProps(context: any) {
+  return {
+    props: {
+      currentTab: context?.query?.currentTab || TabEnum.info,
+      ...(await serverSideTranslations(context.locale, ['publish', 'user']))
+    }
+  };
+}
+```
+#### Use useTranslation Hook in Page
+```typescript
+// pages/yourPage.tsx
+import { useTranslation } from 'next-i18next';
+
+const YourComponent = () => {
+  const { t } = useTranslation();
+
+  return (
+    <Button
+      variant="outline"
+      size="sm"
+      mr={2}
+      onClick={() => setShowSelected(false)}
+    >
+      {t('common:close')}
+    </Button>
+  );
+};
+
+export default YourComponent;
+```
+#### Handle Static File Translations
+```typescript
+// utils/i18n.ts
+import { i18nT } from '@fastgpt/web/i18n/utils';
+
+const staticContent = {
+  id: 'simpleChat',
+  avatar: 'core/workflow/template/aiChat',
+  name: i18nT('app:template.simple_robot'),
+};
+
+export default staticContent;
+```
+### Standardize Translation Format
+- Use the t(namespace:key) format to ensure consistent naming.
+- Translation keys should use lowercase letters and underscores, e.g., common.close.
+
+
 
 ## Build