[Feat] Add simple conv export template

Context

This MR aims to add a simple export example to the already existing aide module template.
This will hopefully ease the export development process by providing the basic functions and conventions we use to create export modules in Aidge.

Modified files

A lot of files/folder have been added :

• aidge_module_template/kernels:

  • my_conv.hpp : Example conv implementation (only printing its arguments values);

• aidge_module_template/operators:

  • __init__.py : Init the operators;
  • Conv2D.py : Example of operator registering;
  • PadConvReLU.py : Example of meta-operator registering;
  • Producer.py : Needed to export the convolution's parameters;
  • utils.py : Hold the export_params() function used by the Producer export node.

• aidge_module_template/static:

  • activation.hpp : Example of an utilitary file holding functions used by the kernels;
  • Makefile : Used to compile the export;
  • typedefs.hpp : Holding activation types;

• aidge_module_template/templates:

  • configuration : Configuration templates for kernels' calls
    • _meminfo.jinja : Memory information for the kernel (offset and memory manager related data);
    • my_conv_config.jinja : Parameters needed to call my_conv_forward();
  • data : Data related templates
    • parameters.jinja : Used to create the Producers files;
  • kernel_forward : Kernel call templates
    • _mem_offset.jinja : Memory offset for output pointer placement;
    • my_conv_forward.jinja : Forward function call for "my_conv" kernel;

• aidge_module_template/export_registry.py : ExportLibMyExport definition;

• aidge_module_template/export_utils.py : Export related functions;

• aidge_module_template/export.py : Run the scheduler_export function then generate a main.cpp file;

• aidge_module_template/utils.py : Define some macros;

• examples/export_conv/export_conv.ipynb : Export generation file example.

TODO

• Update README.md and add export related explainations;
• Write a documented export_conv.ipynb file with a working export;
• Add comments within the export files.