Add show_graphview funcionality.

Context

Adds functionality to output the description of a GraphView in a human-readable JSON format. Solves issue #160.

Added files

• aidge_core/aidge_core/show_graphview.py contains several auxiliary methods to translate the GraphView attributes to a Python dictionary and output the JSON file.
• aidge_core/aidge_core/unit_tests/test_show_graphview.py contains tests to verify that the attributes of the generated JSON correspond to the original GraphView.

@cmoineau @gregkub

changed the description

assigned to @idealbuq

requested review from @gregkub

requested review from @cmoineau

added 3 commits

• caf7a77e...ad54c96a - 2 commits from branch eclipse/aidge:dev
• 352e8733 - Merge remote-tracking branch 'origin/dev' into dev

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added 1 commit

• ba3e7701 - Corrected typehints in show_graphview.py

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Overall the MR looks good to me.

I request some changes, especially the use of !202 (merged).

A little extra point, I saw that you created a very modular structure for your function which eased the review ! In Python the convetion is to prepend with _ functions/members that shouldn't be used outside of the module. This is very minor and I don't even apply it everywhere but function such as: write_dict_json and create_dict could be explicitly marked as not to use directly.

requested changes

added 1 commit

• d2368727 - Added minor corrections required in MR 211 review

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added 1 commit

• 4efb98f2 - Removed commented out lines in python_binding/data/pybind_Data.cpp

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