Change target names

[tizianoGuadagnino]

In the current setting, if someone will FetchContent KISS, there might be conflicts based on target names, as core and pipeline are very common. There is probably another workaround to this, but it makes more sense to remove the aliasing and call every target kiss_icp_<something>. This is the safest option that should not fire back later on, I attach here an example of what I am talking about.

[tizianoGuadagnino]

I think this indicates that we need to revise our beloved build system. I will keep this PR just for the target renaming for now and discuss this offline among us.

[tizianoGuadagnino]

#328 introduce the change in the build system that will also fix FetchContent

[nachovizzo]

I knew this might happen sooner or later. I think the underlying problem is not the name of the targets but the lack of an installable C++ library.

I postponed this always, but I'd say we could now fix this the proper way. Using modern cmake, and relying on exported targets instead of manually adding directories in the current build space

A probably outdated example:
https://github.com/PRBonn/vdbfusion/blob/main/src/vdbfusion/vdbfusion/cmake/Install.cmake

In summary, I think we should make the C++ library installable, like is the case with all the dependencies we use

[tizianoGuadagnino]

Absolutely agree with @nachovizzo, that should be the proper way. Shall we merge this and open a new branch for the install ?

[nachovizzo]

Absolutely agree with @nachovizzo, that should be the proper way. Shall we merge this and open a new branch for the install ?

I'm fine with it as long as we commit to do it and review it relatively soon

I will approve this so I don't block you but please let's revisit this soon. I won't have time in the next weeks to work on this particular build feature

[tizianoGuadagnino]

You got my word.