Add maximum node width option

[joao-m-santos]

Feature description

Allow for setting a max width to an alluvial diagram's nodes.

Problem/motivation

There are cases where node labels can become very long, which causes the diagram to render with a very big margin on the left/right sides. By having a max width option, users can mitigate this behavior.

Describe alternatives you've considered

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Additional context

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Validations

• [X] Follow our Code of Conduct
• [X] Read the Contributing Guidelines.
• [X] Check that there isn't already an issue that request the same feature to avoid creating a duplicate.