Revert "Move runners to src folder."

This reverts commit c986ffc264d8d36639a829bd4bf81c4702e77fc5.
Revert "Move test function implementation to "resource""

This reverts commit a20bd20f4d3d71da6b7fb162faf6a8f9921fe680.
Revert "Add mex function of test functions"

This reverts commit 066609bb36bcb9fbe302eba9a6fb0ac5608a2c73.