many m-tx package files duplicated

[mbertucci47]

• [x] I have read the MiKTeX Contributing Guidelines

Many files from the m-tx package are in multiple locations. For example the directories .../doc/generic/m-tx and .../source/m-tx/doc contain many of the same files (though not exactly the same ones). Similarly for .../tex/generic/m-tx and .../source/m-tx/tex, .../tex/latex/m-tx and .../source/m-tx/latex, and .../scripts/m-tx and .../source/m-tx/scripts.