Add setup and CI dependencies

[joseivanlopez]

Problem

Some dependencies have been added, but the setup script and CI tasks do not include them.

Note: we need some way of extracting deps automatically. Having spec, setup and CI manually in sync is error prone.

Solution

Add dependencies.

[jreidinger]

@joseivanlopez btw in ruby we have rake build_dependencies:install # Install the packages required for building maybe we can have something similar also for runtime dependencies

[joseivanlopez]

@joseivanlopez btw in ruby we have rake build_dependencies:install # Install the packages required for building maybe we can have something similar also for runtime dependencies

I think that is the idea of the setup script: to install and configure everything for running agama. Not sure if having a task only for installing deps has any value here.