Add global template dir

[nicola-lunghi]

Hi, what would the best way to add a global template dir? I have the following structure

│   CMakeLists.txt
├───cmake
│   └───Modules
│       └───cmake-pandocology
│               .gitignore
│               cmspandoc.cmake
│               pandocology.cmake
│               README.md
│
├───src
│       CMakeLists.txt
│       tp01-2000-0135.md
│
└───templates
│               default_template.docx

I would like if possible to specify the template dir once (like an include dir) ?