feat: add Copy derive trait to Type enum

sbroad-core/src/executor/engine/helpers.rs

sbroad-core/src/ir.rs

sbroad-core/src/ir/aggregates.rs

sbroad-core/src/ir/explain.rs

sbroad-core/src/ir/expression/types.rs

sbroad-core/src/ir/function.rs

sbroad-core/src/ir/operator.rs

sbroad-core/src/ir/relation.rs

sbroad-core/src/ir/transformation/equality_propagation.rs

sbroad-core/src/ir/transformation/redistribution/groupby.rs