Change category to group in PublishViewsCommand

[emmadesilva]

-     protected $signature = 'publish:views {category? : The category to publish}';
+     protected $signature = 'publish:views {group? : The group to publish}';

[emmadesilva]

I also did an unbiased comparison with ChatGPT (two prompts with orders swapped as to not give bias depending on order of files) and both agreed group is better:

The sentiments expressed are:

• Preference for "group" over "category" because "group" suggests intentional bundling for a purpose, fitting the action of publishing related views.
• "Category" feels too abstract and passive, suited more for loose classification rather than structured action.
• Consistency with Laravel terminology is important; Laravel already uses "group" in similar contexts.
• Technical accuracy matters; the internal code already uses "ViewPublishGroup" and "group names."
• Clarity in communication is a priority; "group" sounds cleaner and matches the code’s logic better.

[emmadesilva]

Completed in #2166