Multi modal RAG + QA Cookbooks (langchain-ai#12946)

Co-authored-by: Erick Friis <erick@langchain.dev>
Co-authored-by: Eugene Yurtsev <eyurtsev@gmail.com>
Co-authored-by: Vinzenz Klass <76391770+VinzenzKlass@users.noreply.github.com>
Co-authored-by: Praveen Venkateswaran <praveenv@uci.edu>
Co-authored-by: Praveen Venkateswaran <praveen.venkateswaran@ibm.com>
Co-authored-by: Kacper Łukawski <kacperlukawski@users.noreply.github.com>
Co-authored-by: Bagatur <22008038+baskaryan@users.noreply.github.com>
Co-authored-by: Bagatur <baskaryan@gmail.com>
Co-authored-by: Ofer Mendelevitch <ofermend@gmail.com>
Co-authored-by: Harrison Chase <hw.chase.17@gmail.com>

Author: 9 people