The biggest release yet!

This release completely rewrites the rendering. we now faithfully recreate the jj log rendering from scratch allowing us to dynamically change any aspect of it without calling out to jj and that enables.....

Rebase preview.

Press r p to enable preview rebase mode, allowing you to change between all of jj's rebase options and adjust the target and see the resultant graph update in real time!! This may have bugs, let me know if it crashes, it's super cool and I'm really proud of it.

The top right corner shows the current rebase settings and the keys you can use to change them. When you're done press y to actually do the rebase.

Other changes

• fixed a bug with file content rendering not updating
• fixed paths handling for paths with weird stuff that shell doesn't like
• fixed the commit command putting the commit in the wrong spot

Full Changelog: v0.17.0...v0.18.0