Implement chatbot improvement ideas for beyondexams

Chatbot improvement ideas: https://docs.google.com/document/d/1u6OMmkAhx-AtzbHtPMkb4dxTmdCF2YpJrOgwe_3ZcsU/edit?usp=drivesdk Frontend note: First we will need the students to take notice of the chatbot: 1. Create a new API timilar to /generate_nudge_data node called /beyondexams/generate_nudge_data to do the following specific to beyondexams: Add new optional param called: timestamp in MM:SS If page_url is a course video page, for example: https://beyondexams.org/video/KA_wOqYc1zo?course=learn-blockchain-basics-101-for-free-d87a3&module=12202 then extract slug: KA_wOqYc1zo and call youtube’s API (preferrably a free one if available) to obtain its transcript (no timestamps needed for now) Use the transcript (FULL or uptil MM:SS) to frame nudge, nudge_questions and suggested_questions Frontend note: If user decides to click the chatbot window while watching a video: 2. add a new API: /beyondexams/summarize will take page_url and optional timestamp in MM:SS -> fetch transcript -> if t