Ability to summarise the webpage

[Royal-lobster]

Probably something like /summarize - which should summarise the document as per user style guide like

/summarize key points with emoji at starting of the of each point

[Goketech]

@Royal-lobster This looks like an exciting issue, could you provide more description on the task

[Royal-lobster]

We can use langchain map reduce https://js.langchain.com/v0.1/docs/modules/chains/popular/summarize/ to summarize the webpage content. tho i am still thinking how we can let users to that in our current UI