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Issue Description:

When running tests in xCode, the ProgressBar test cause the `update(percent:text)` function to crash since `term.width` is `zero` and `prefix.utf8.count` = 3.

Doing a little research:

When getting the `terminalWidth()` in `TerminalController.swift` :

1. `SPMLibc.getenv("COLUMNS")` is returning `nil`
Therefore, we cannot get the term width from the environment.

2. Then, when trying to determine using ioctl, `winSize()` returns `zero`.
[I still need to dig a little deeper into what `ioctl(,,_)` is actually doing], but it is returning `true`, therefore, that function returns `ws_col` which is zero sin winSize is zero.

So, going back to the TerminalController initializer, it does `width = TerminalController.terminalWidth() ?? 80` since TerminalController.terminalWidth() returns zero, not nil, our terminalController width equals zero, and that’s why that’s failing.