We need a new function igraph graph power() that computes the k‑th power of a graph and writes the result…

We need a new function igraph graph power() that computes the k‑th power of a graph and writes the result…: a task in LegoFlow-SWE (Harbor dataset). Desired signature: c igraph error t igraph graph power(const igraph t graph, igraph t res, igraph integer t order, igraph bool t directed);