Create an experimental task that is ran at the end of the pipeline that can assign different scores to each node. Implement page rank as the first score to be assigned.

• Modify the data models to accept score
• Create and abstract base_node_scorer of the score
• Implement page_rank_node_scorer
• Create a new pipeline that uses the new task
• (Optional) Create a simple retriever that takes into account the node scores

_{From SyncLinear.com | COG-1579}