Add Tutorial for Matrix Operations Handling

[khoinguyyyen]

Adding tutorial involving matrix multiplication

• This example demonstrates handling memory spaces and utilizing parallel computation for a matrix-matrix multiplication operation
• Includes Makefile and CMakeLists.txt

[lucbv]

Some information would be helpful, it's not clear that this is for sparse matrices, could be dense as well in which case GEMM would be the kernel used. We already have unit-tests and performance tests for this but if something in the tutorial is needed we can also update that. Note that we are not supporting Makefile in any shape or form in Kokkos Kernels...