feat: add ingestion pipeline children delimiters configs (#11979)

### What problem does this PR solve?

Add children delimiters for Ingestion pipeline config

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

web/src/locales/en.ts

@@ -295,6 +295,11 @@ export default {
       delimiter: `Delimiter for text`,
       delimiterTip:
         'A delimiter or separator can consist of one or multiple special characters. If it is multiple characters, ensure they are enclosed in backticks( ``). For example, if you configure your delimiters like this: \\n`##`;, then your texts will be separated at line breaks, double hash symbols (##), and semicolons.',
+      enableChildrenDelimiter: 'Child chunk are used for retrieval',
+      childrenDelimiter: 'Delimiter for text',
+      childrenDelimiterTip:
+        'A delimiter or separator can consist of one or multiple special characters. If it is multiple characters, ensure they are enclosed in backticks( ``). For example, if you configure your delimiters like this: \\n`##`;, then your texts will be separated at line breaks, double hash symbols (##), and semicolons.',
+
       html4excel: 'Excel to HTML',
       html4excelTip: `Use with the General chunking method. When disabled, spreadsheets (XLSX or XLS(Excel 97-2003)) in the knowledge base will be parsed into key-value pairs. When enabled, they will be parsed into HTML tables, splitting every 12 rows if the original table has more than 12 rows. See https://ragflow.io/docs/dev/enable_excel2html for details.`,
       autoKeywords: 'Auto-keyword',
@@ -779,7 +784,7 @@ This auto-tagging feature enhances retrieval by adding another layer of domain-s
         'The base URL of your Confluence instance (e.g., https://your-domain.atlassian.net/wiki)',
       confluenceSpaceKeyTip:
         'Optional: Specify a space key to limit syncing to a specific space. Leave empty to sync all accessible spaces. For multiple spaces, separate with commas (e.g., DEV,DOCS,HR)',
-      s3PrefixTip: `Specify the folder path within your S3 bucket to fetch files from. 
+      s3PrefixTip: `Specify the folder path within your S3 bucket to fetch files from.
 Example: general/v2/`,
       S3CompatibleEndpointUrlTip: `Required for S3 compatible Storage Box. Specify the S3-compatible endpoint URL.
 Example: https://fsn1.your-objectstorage.com`,
@@ -1199,6 +1204,7 @@ Example: Virtual Hosted Style`,
       tab: 'Tab',
       space: 'Space',
       delimiters: 'Delimiters',
+      enableChildrenDelimiters: 'Child chunk are used for retrieval',
       merge: 'Merge',
       split: 'Split',
       script: 'Script',