Include Python example for workflow templates

[kothant534-cmyk]

Added a Python example to demonstrate workflow template usage, including input handling and output structure.

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Summary by cubic

Added a Python example to the workflow templates doc to show how to handle input items and produce output items, mirroring n8n’s Code node behavior. This helps users understand template logic with a simple, runnable snippet.

• New Features
  • Added execute(input_data) function that reads task, outputs originalTask, modifiedTask (title-cased), and count (word count).
  • Handles empty inputs and invalid task strings.
  • Includes a small mock input for local testing.

^{Written for commit 5efc36a. Summary will update automatically on new commits.}

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[cubic-dev-ai]

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