Various meta-op fixes

• Added meta-op bindings, with various fixes;
• Added expected.hpp in future_std for future usages;
• Changed Pad operator first argument from array of array to array (like ONNX);
• Fixed "aidge_core-NOTFOUND" bug with setup.py and use default install path.

.gitlab/ci/build.gitlab-ci.yml

@@ -89,7 +89,6 @@ build:ubuntu_python:
     - source venv/bin/activate
     # Numpy dependancy for unit test
     - python3 -m pip install numpy
-    - export AIDGE_INSTALL=`pwd`/install
     - python3 -m pip install .
   artifacts:
     expire_in: 1 week
@@ -148,7 +147,6 @@ build:windows_python:
     - venv\Scripts\Activate.ps1
     # Numpy dependancy for unit test
     - python -m pip install numpy
-    - $env:AIDGE_INSTALL = "$pwd" + "install"
     - python -m pip install .
   artifacts:
     expire_in: 1 week