Sl Submit Diff

If you're working at Meta or using their Sapling VCS with Phabricator for code review, this automates the submission flow. It commits your changes if needed, then runs `jf submit --draft` to push your stack to Phabricator where each commit becomes its own diff. The commit messages get updated with the Differential Revision links automatically. One heads up for Windows users: you'll need to use the full path to `sl.exe` since PowerShell already uses `sl` as an alias for changing directories. It's a narrow use case, but if you're in that Meta-style workflow, it saves you from running the same sequence of commands manually every time you want feedback on code.