[Fix] Producer clone and Tensor copy

Context

Closes #207 (closed)

Major modifications

• Tensor

  • add compound assignment operator (+=, -=, *=, /=) with Tensor and arithmetic values
  • add operator(+, -, *, /) with arithmetic values
  • add friend symetric operator (+, -, *) with arithmetic values
  • add fmt parsing function (now you can display a Tensor with fmt)
  • Add move assignment operator
  • Fix 'Tensor::clone()' if original Tensor has no implementation
  • Change Tensor::operator= behaviour to always perform a shallow copy in case of copy constructor/assignment operator calls

• Pop_Op: fix kernel that should not be inplace

• Data: add copy/move constructor/assignment operator

src/operator/Pop.cpp

@@ -33,7 +33,7 @@ void Aidge::Pop_OpImpl::forward() {
     const Pop_Op& op = dynamic_cast<const Pop_Op&>(mOp);
 
     assert(op.getInput(0) && "missing input #0");
-    *op.getOutput(0) = op.getInput(0)->extract({op.forwardStep()});
+    *op.getOutput(0) = op.getInput(0)->extract({op.forwardStep()}).clone();
 }
 
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