Add Python convolution examples

Translate [https://examples.itk.org/src/filtering/convolution/convolveimagewithkernel/documentation](https://examples.itk.org/src/filtering/convolution/convolveimagewithkernel/documentation) into a Python script or Jupyter notebook

Start with the linked convolution example documentation and inspect the repository's example layout to find where a Python script or Jupyter notebook belongs. Translate the documented image convolution workflow into Python, then verify that the resulting example is runnable and covers the same behavior as the source example.

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