Fix: Added table of contents extraction functionality and optimized form item layout #9869 (#10492)

### What problem does this PR solve?

Fix: Added table of contents extraction functionality and optimized form
item layout #9869

- Added `EnableTocToggle` component to toggle table of contents
extraction on and off
- Added multiple parser configuration components (such as naive, book,
laws, etc.), displaying different parser components based on built-in
slicing methods

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

web/src/components/delimiter-form-field.tsx

@@ -61,7 +61,7 @@ export function DelimiterFormField() {
               <FormLabel
                 required
                 tooltip={t('knowledgeDetails.delimiterTip')}
-                className="text-sm text-muted-foreground whitespace-break-spaces w-1/4"
+                className="text-sm text-text-secondary whitespace-break-spaces w-1/4"
               >
                 {t('knowledgeDetails.delimiter')}
               </FormLabel>