Add aggregate (or space product) types declaration/initialization

src/language/ASTNodeAffectationExpressionBuilder.cpp

src/language/ASTNodeDataTypeBuilder.cpp

src/language/ASTNodeExpressionBuilder.cpp

src/language/ASTNodeListAffectationExpressionBuilder.cpp

src/language/ASTNodeListAffectationExpressionBuilder.hpp

src/language/ASTSymbolInitializationChecker.cpp

src/language/CMakeLists.txt

src/language/node_processor/AffectationProcessor.hpp