Update file compress_dataset_without_enstools_write.ipynb

Update documentation following the suggestions from the article reviewers.

docs/source/contribute.rst

@@ -3,7 +3,10 @@ Contribute
 
 Bug Reporting
 -------------
+To **report a bug** or to **request an enhancement**, please use the `Issue tracker <https://github.com/wavestoweather/enstools-compression/issues>`_ from our `GitHub page <https://github.com/wavestoweather/enstools-compression/>`_.
 
-To **report a bug** or to **request an enhancement** please use the `Issue tracker <https://github.com/wavestoweather/enstools-compression/issues>`_ from our `Github page <https://github.com/wavestoweather/enstools-compression/>`_ .
-
+Extending the Tool
+------------------
+To extend the tool with a new plugin that already has an HDF5 plugin available, a Python interface is required. Good examples of how filter interfaces look can be found in this `source file <https://github.com/silx-kit/hdf5plugin/blob/main/src/hdf5plugin/_filters.py>`_. In case of developing a new interface, it is advisable to integrate this interface into the `hdf5plugin repository <https://github.com/silx-kit/hdf5plugin>`_, so a wider audience can benefit from it.
 
+Once the Python interface exists, the only additional required step is to add the filter definitions to `GitHub page <https://github.com/wavestoweather/enstools-encoding/>`_. It involves minimal additional work, adding only few lines to a `single file <https://github.com/wavestoweather/enstools-encoding/blob/main/enstools/encoding/definitions.py>`_.
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