Merge branch 'feature/unit-tests' into 'develop'

src/language/ast/ASTNodeBuiltinFunctionExpressionBuilder.cpp

src/language/ast/ASTNodeDataTypeFlattener.cpp

src/language/ast/ASTNodeFunctionExpressionBuilder.cpp

src/language/ast/ASTNodeListAffectationExpressionBuilder.cpp

src/language/utils/BuiltinFunctionEmbedderUtils.cpp

src/language/utils/SymbolTable.hpp

tests/CMakeLists.txt

tests/test_ASTNodeBuiltinFunctionExpressionBuilder.cpp

tests/test_ASTNodeDataTypeBuilder.cpp

tests/test_ASTNodeDataTypeFlattener.cpp

tests/test_ASTNodeFunctionExpressionBuilder.cpp

tests/test_ASTNodeListAffectationExpressionBuilder.cpp

tests/test_BuiltinFunctionEmbedderUtils.cpp

tests/test_BuiltinFunctionRegister.hpp

tests/test_SymbolTable.cpp