Preview Changes Setting

[jayfunk]

Have default setting that will preview the changes before committing them. This view should be similar to the find all buffer and being able to navigate those changes with clicks or keyboard shortcuts. Saving that buffer will close it and commit the changes. Closing the buffer without a save will abort the operation

[jurassix]

This feature requires changes to jscodeshift around their reporting. I've opened an issue, FB was unresponsive until I closed it. They may be interested in a PR once I fork and do the work. I've found the extension points I need inside jscodeshift, seems pretty straightforward.

Remaining pieces are what is the contract to return? At the basic level we need which files would be change. Next it would be great to just return new source and we can do a diff on our end. Or possibly figure out some way of just sending the lines that changed. etc.