Create table for offline mode only

Our app lambda functions works with existing DynamoDB tables. I have cloudformation resources definitions of the tables but these tables should be created `only in offline mode` (as they already exist in AWS). How do I configure dynamodb local plugin to look for dynamodb resource definitions and create them but only for offline mode.

Start by reviewing how the plugin handles CloudFormation resource definitions and offline-mode startup. Determine whether DynamoDB local can create the declared tables without affecting existing AWS tables, then verify the behavior separately in offline and deployed environments.

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