Feat: add Docling parser (#10759)

### What problem does this PR solve?
issue:
#3945
change:
add Docling parser

### Type of change

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

web/src/components/layout-recognize-form-field.tsx

@@ -18,6 +18,7 @@ export const enum ParseDocumentType {
   DeepDOC = 'DeepDOC',
   PlainText = 'Plain Text',
   MinerU = 'MinerU',
+  Docling = 'Docling',
 }
 
 export function LayoutRecognizeFormField({
@@ -43,6 +44,7 @@ export function LayoutRecognizeFormField({
           ParseDocumentType.DeepDOC,
           ParseDocumentType.PlainText,
           ParseDocumentType.MinerU,
+          ParseDocumentType.Docling,
         ].map((x) => ({
           label: x === ParseDocumentType.PlainText ? t(camelCase(x)) : x,
           value: x,