Add SVD primitive (#809)

Add SVD op using Accelerate's LAPACK following
https://developer.apple.com/documentation/accelerate/
compressing_an_image_using_linear_algebra

Co-authored-by: Nicolo Valigi <nvaligi@apple.com>

mlx/linalg.h

@@ -62,4 +62,6 @@ norm(const array& a, int axis, bool keepdims = false, StreamOrDevice s = {}) {
 
 std::pair<array, array> qr(const array& a, StreamOrDevice s = {});
 
+std::vector<array> svd(const array& a, StreamOrDevice s = {});
+
 } // namespace mlx::core::linalg