Dependency checks should automatically offer to install the necessary -dev packages

Similar to what some distros have for missing commands:

$ jython
bash: jython: command not found...
Install package 'jython' to provide command 'jython'? [N/y] 

This will really improve the 'build a project for the first time' experience, which is pretty shit for all build systems in the world right now, as detailed in https://github.com/mesonbuild/meson/issues/985#issuecomment-267258425.

Must also include an option for disabling this when building in CI, for instance.