Logging could be better for very large projects

I have a project with thousands of files. When I run a codemod across all of them, the terminal output looks like this:


When the entire terminal screen is filled with the same `Sending 50 files to free worker...` message, I can't tell if new lines are being created or not, because they're all the same.

Potential solution: prefix each line with a counter. Or add some other information that will change on each log line:

```
[0] Sending 50 files to free worker...
[1] Sending 50 files to free worker...
[2] Sending 50 files to free worker...
```

or

```
Sending 50 files to free worker... (8000 remaining)
Sending 50 files to free worker... (7950 remaining)
Sending 50 files to free worker... (7900 remaining)
```