FR: `jj web`, a web-based interactive log viewer for `jj log` and `jj op log`

[PhilipMetzger]

We've also discussed this in Discord.

Ideally both the normal log jj log and jj op log should be available in the UI.

Quoting @thoughtpolice from Discord for the benefits it brings.

For rebasing changes especially and just general history fiddling -- it's just unbelievably efficient. Unbeatable IMO. You'd have to really create an entire TUI to match its efficiency in the terminal, but click and drag is obviously a lot more approachable. [...] You can just do things with it in seconds that would take honestly at least a minute or two for me to run multiple rebase commands to achieve the same thing. Blew my mind.

We'll definitely want to base the work of Sapling's ISL addon.