Pipeline-csv

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+ Added method Tube.features return defects and lineobjects of the pipe, arranged by distance.

* Parameter `warns` in `File.get_tubes` method made optional.

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* Convert `None` to empty string on setting `Row.obj_id` property.

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+ Add Python 3.11 support to autotests.

+ Add Row.min_diam amd Tube.min_diam optional properties as pipe minimal diameter.

+ Add Row.obj_id optional property.

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+ New class csvfile.defect.Anomaly for represense line objects and as base class for Defect.

+ Extend `csvfile.Row.as_lineobj` method with keyargs: length, width, orient1, orient2.