Added a new cmake_build for generating a debian

[tarunkartik]

If you want to generate a standalone behaviortree_cpp debian that you can install and link your project against,

• Clone the BehaviorTreee.CPP repo
• cd into the cloned repo
• run the following commands:

cmake -S . -B build -DCMAKE_BUILD=ON
cmake --build build/ -j{Number_of_cores} --target package

Replace {Number_of_cores} with how many cores you would like to use to build.

• If built succesfully, it should generate a .deb file inside the build folder.
• You can install this debian in any container or environment using apt install /path/to/.deb

[tarunkartik]

@facontidavide is there something blocking this merge or is this a feature that you dont foresee people using?

[facontidavide]

Is this change tested on Windows? We don't want to break it there

[tarunkartik]

I have not tested it on windows. I can do that. It looks like the repo already has a pipeline to test against windows. Are there any instructions on how to trigger them?