Add support for lower than 8-bits precision

This MR intend to add support for lower than 8-bits precision. It extends on the first PoC done on export_arm_cortexm and generalizes it for export_cpp:.

TODO:

• core: Add conversion support for lower than 8-bits data types;
• core: Extend/improve applyWeightInterleaving recipe; check later
• export_cpp: Adapt kernels to support lower than 8-bits data types;
• export_cpp: Add lower than 8-bits unit tests.

changed milestone to %aidge v0.8.0

added Feature 🚀 label

assigned to @olivierbichler

changed the description

mentioned in merge request aidge_core!479 (merged)

added 1 commit

• bbd62818 - Refactored old code

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marked the checklist item core: Add conversion support for lower than 8-bits data types; as completed

changed the description

added 1 commit

• bb480b57 - Operators adaptation

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marked the checklist item export_cpp: Adapt kernels to support lower than 8-bits data types; as completed

added 1 commit

• 7c60cdb8 - Fixed arguments order

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added 2 commits

• 96880761 - Fixed type conversion
• ab8cc839 - Added Conv 4-bits testing

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added 24 commits

• ab8cc839...135cab11 - 21 commits from branch dev
• 9cc0fdd7 - Merged with dev
• cc8c1d41 - Use standard C++ cstddef instead of POSIX sys/types.h
• dc44d7b4 - Added tests in low-bit precision

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marked the checklist item export_cpp: Add lower than 8-bits unit tests. as completed

added 2 commits

• 566e26e0 - 1 commit from branch dev
• c21135a4 - Merge branch 'dev' into quant

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added 41 commits

• c21135a4...b61b991b - 40 commits from branch dev
• 1080a181 - Merged with dev

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changed the description