Adding tiny-process-library

[traversaro]

The tiny-process-library ( ) is a small C++ library to launch processes, and it will be a dependency on Windows of the next release of the Gazebo robotic simulator (https://github.com/conda-forge/gazebo-feedstock, gazebosim/gazebo-classic#2864).

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[conda-forge-linter]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipes/tiny-process-library) and found it was in an excellent condition.

[traversaro]

@conda-forge/help-c-cpp @wolfv The recipe is ready for review.