fix(zkstack_cli): make progress bar optional in non-terminal envs #3146
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What ❔
Enables plain logging as a fallback for progress bar.
Why ❔
Spinner does not print anything when zkstack is redirected to a file, piped or is just ran in an env with no virtual terminal. Most notably this affects our CI where all spinner messages are just swallowed into nowhere.
Checklist
zkstack dev fmt
andzkstack dev lint
.