Allow for configuring the prompt for summarization

Problem/Motivation

At present the prompt is not configurable.
I felt the need to configure it, since it was giving me different summaries on refreshing the same page.
I wanted the summary to be displayed in a list format, which it displayed sometimes, rest of the times it was a summarzied text block.
So if I had access to configure the prompt myself, I would have made changes to how I wanted the results to be returned from the AI.

Steps to reproduce

Just use the module as you are supposed to.
Check the summaries appearing the listing page after refreshing the page.

Proposed resolution

Provide a configuration for editing prompt.

Remaining tasks

NA

User interface changes

NA

API changes

NA

Data model changes

NA