[core] Enhance Dependency Management in CMake with find_package

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What commit version of aidge do you use

• aidge_core:dev

Problem description

To improve flexibility and build efficiency, dependencies in the project should first attempt to use system-installed versions via find_package. If unavailable, a fallback mechanism using FetchContent should be employed to fetch the required dependencies from their respective repositories.

It will also allow to get rid of such things : https://github.com/catchorg/Catch2/issues/2712