Add simplified search-results view

[jim-wilson-kt]

Keep the existing view as an option

Add a simplified view that looks something like this:

General problem statements, users and observers, and high-level use cases available at https://oagi.atlassian.net/wiki/x/FQBtMgE.

[hakjuoh]

@jim-wilson-kt Instead of changing the screen with a single option, I made it possible to select columns as follows.

In the settings, the user specifies which columns to display, and on the actual screen, only the specified columns are shown.

It might be a bit cumbersome, so please let me know what you think.