docs: Add graph to more JJ command help

[poliorcetics]

Description

Several JJ commands already have graphs to help understand them when in their long --help form, this is awesome!

I would like all JJ command working with graph of more than a single revision to have at least one of those.

Steps to Reproduce the Problem

1. jj interdiff --help <- no graph

Expected Behavior

The current list of commands is at https://martinvonz.github.io/jj/v0.17.1/cli-reference/ and we can for example see jj next has a graph. This should be the standard whenever possible/relevant, since words alone are often confusing/not enough when talking about graphs