Refactor OperatorImpl for backend/export

See merge request !79

[Build] Align build to new aidge_core dependencies

See merge request !89

Simplify dependencies for binding and allow both TEST and PYBIND on
when Python embedded interpreter is available.
This aligns to the new aidge_core dependencies which are self-sufficient.
Update cmake requirements to >=3.18+ in order to support missing
Python embedded interpreter.

This change requires the installed aidge_core library to include the
merge request aidge_core!187

[Setup] Add support for editable mode

See merge request !80

Christophe Guillon authored 6 months ago and Olivier BICHLER committed 6 months ago

Add necessary support for editable mode build with:
pip install --no-build-isolation -v -e .

Reported changes done for this support in aidge_core.
Ref aidge_core merge request aidge_core!154

Add backward pass CPU implementation for Mul operator

See merge request !85

feat : operator constant of shape

See merge request !84

Fix inverted dims in Pad

See merge request !87

Update README.md

See merge request !86

Add GridSample impl for 1D and 2D

See merge request !77

Learning backend cuda

See merge request !75

Merge branch 'learning_backend_cuda' of gitlab.eclipse.org:hrouis/aidge_backend_cpu into learning_backend_cuda