Matrices
rustebra provides two matrix types: StaticMatrix<T, R, C>, stack-allocated with
compile-time-known shape, and DynamicMatrix<T>, heap-allocated behind the alloc feature
with a runtime-known shape. This section covers how to construct them and the operations —
arithmetic, matrix-vector and matrix-matrix products, transpose, rank, and the LU/QR/SVD
decompositions — they support.