Export refactor

Context

&12

Changes

• Adapt arm export to refactoring of export, moving most functions to aidge_core and adapting structure (see aidge_core!163 (merged))
• Move N2D2 kernels for Conv, Fc and Pooling to aidge_arm replacing existing kernels
• Split ElemWise operations (Add, Mul, Div, Sub) in multiple files
• Add a template for saving outputs (not used yet!)
• Add support for operator Atan
• Improve Concat kernels
• Fix Split kernel

assigned to @cmoineau

added 2 commits

• a0dc9e6e - Adapt forward to output nodes of exports being pointer of pointer.
• 2ae66838 - Remove is_input and is_output from node_export.

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changed title from Allow no input producer to Export refactor

changed the description

mentioned in epic &12

requested review from @axelfarr

mentioned in issue #9 (closed)

approved this merge request

added 1 commit

• 10868393 - Add ConvDW and Softmax to export.

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reset approvals from @pineapple by pushing to the branch

I officially approve this merge request.

mentioned in commit 56506f56

merged