fix: update default value for publishToCommunity in CreateWorkflowApp…

[anthhub]

…Modal

• Changed the default value of publishToCommunity from false to true to ensure workflows are published to the community by default.
• Updated the initial form data to reflect this change, ensuring consistency in the modal's behavior.
• Ensured compliance with coding standards, including the use of optional chaining and nullish coalescing for safer property access.

Summary by CodeRabbit

• New Features
  • Newly created workflow apps now default to being published to the community.

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