I make a quick search on documentation and on the forum but looks like no one asked for a small, just required installation files.
My project is already a mess and I would like to avoid all the examples and suppor to third party files to keep my project size small as possibile.
So during the installation other than Examples which file could I avoid to extract?
I think it would just be Examples in your case. As far as I’m aware there isn’t any built-in third party support for other plugins. Actually, I usually see plugins that work with Astar being the ones with the support for it rather than it coming from Astar. If there is any third party support I believe it’s all just thinks to make sure Astar doesn’t break other assets. 
Ok cool, my question started because I see RVO and TurnBased, but also I just notice that the weight is totally irrelevant, so Thank you again I’ll start ASAP 
Enjoy! Welcome to the community as well, let us know if you have any other issues 