Add CLI progress bars

[fischeti]

CLI Progress bars

Adds progress bars to bender actions that require longer network access. A taste is shown below*

*some style changes have been done since this recording.

Implementation

The progress bars are rendered with the crate indicatif, that allows rendering of multiple progress bars at once. The state of the progress bars is extracted from the stderr output of the spawned git commands i.e. a separate task is spawned alongside git tasks to parse git output lines and update the progress bar state. I initially thought about adopting the git2 crate, which would have built in progress callbacks. However, this would have been a larger change and also poses some challenges since those git tasks are not asynchronous and also credential handling would be more complicated, which is why I opted for stderr parsing in the end.

Related Changes

todo

TODOs

• Check output in log files (e.g. CI). In theory, this should work outside of the box.
• Check more bender commands. I focused mostly on checkout, but others use the same underlying functions so there should not be an issue in theory.