feat: operations should always leave a clean repository

[geritwagner]

Feature Request

Describe the Feature Request

Operations should always leave a clean repository and leave no uncommitted changes. Otherwise, users would have to figure out whether to keep or discard the changes.

Describe Preferred Solution

The review_manager should keep track of the files that are expected to go into the next commit (can be discarded if the operation fails). The list should be cleared after each commit. When an operation fails, a roll-back method should discard changes based on the list (unless in debug mode). It may also be helpful to print a warning for untracked files.