This skill should be used when the user says "shipping", "arness shipping", "ship it", "ship", "create PR", "open pull request", "push and PR", "commit and push", "wrap up", "ship the feature", "ship the fix", "ready to ship", "push changes", "finalize", "finish up", "done", "arn-shipping", or wants to commit, push, and optionally create a pull request. Handles branching, staging, committing, pushing, and PR creation as a single guided flow. Chains from arn-implementing at completion.