Add Previous/Next Page Context Support for Multimodal Classification

[Behrad-Gh]

Is your feature request related to a problem? Please describe.
Currently, the multimodalPageLevelClassification option processes individual pages without including the surrounding page context. This limits classification accuracy when page content depends on or relates to adjacent pages.
Describe the solution you'd like
Enhance multimodalPageLevelClassification to accept optional previous and next page data as additional context. This would allow the multimodal classification to make more informed decisions by considering the surrounding pages when classifying the current page.
Additional context
This enhancement would improve classification accuracy for documents where understanding the flow between pages is important for correct classification.