Deploy as debian package

[orzechow]

Inspired by KIT-MRT/arbitration_graphs#65, let's

• setup CPack for util_caching and
• deploy util_caching as debian package (via GitHub Action asset)

[orzechow]

@ll-nick Should we install util_caching into /opt instead of /usr etc?
There are various opinions on this (e.g. this unix stackexchange answer).

The main point against /usr IMHO is, that is suggests the package is deployed via a package manager like apt – which is not the case here.

Btw:
In an attempt to fix the install directory of the arbitration_graphs GUI (consistent between tar.gz, deb package and local cmake --install), I changed the install directory to /opt there.
Thus, I'd prefer to have this consistent here as well.
But, we could also use /usr for arbitration_graphs (i.e. force it for tar.gz and local cmake --install)

[orzechow]

Yikes… I just figured that the /opt install of arbitration graphs is off…

KIT-MRT/arbitration_graphs#70 (comment)

[ll-nick]

I don't have a strong opinion on that. /opt does not seem right but that's a pure gut feeling.

Right now, the deb package is not being installed via a package manager but what if one day it is (e.g. via a ppa). Would you then change the install structure?

It seems like you opted for /usr now which is totally fine for me 👍