Decoration less output

Hello there !

I'd really like to `tb -l --no-decoration pending` or similar for interoperability.
The output would be only "the task id;the task state;the task description", one per line.
This could allow other programs (notifications, voice assistants, scripts) to integrate taskbook easily.

What do you think about this ?

Start by locating the CLI handling for `tb -l`, `--no-decoration`, and `pending`, then inspect how task output is currently formatted. Done means the requested option produces only the task id, state, and description separated by semicolons, one task per line, while existing output remains available.

Written by the indexing model from the issue text.