Improve pipelines setup command with validation retry loops (#12401)

Author: jonesphillip

.changeset/fancy-gifts-shave.md

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+---
+"wrangler": minor
+---
+
+Add validation retry loops to pipelines setup command
+
+The `wrangler pipelines setup` command now prompts users to retry when validation errors occur, instead of failing the entire setup process. This includes:
+
+- Validation retry prompts for pipeline names, bucket names, and field names
+- A "simple" mode for sink configuration that uses sensible defaults
+- Automatic bucket creation when buckets don't exist
+- Automatic Data Catalog enablement when not already active
+
+This improves the setup experience by allowing users to correct mistakes without restarting the entire configuration flow.