Feature Request: Ability to control detail of index files

[nascode]

Currently, the index file generated is mainly based on markdown files' title and heading. I would love to add more control about this so we can also put text content to the index.

Sure, adding more info on the index file will make it bigger, that's why I hope this is configurable.

What I wish is to approximate Docusaurus.io Algolia site search. You can see that search result also contains part of the text content like this: