Framework should provide a cmake macro that wraps around the code generator

[climbfuji]

Description

To define a standard interface for host models using a CMake build system, the framework should provide a CMake macro that runs the code generator (capgen) and returns a standard set of information that a host model needs (e.g. all auto-generated files).

Alternatives (optional)

Leave it up to the host model how to call capgen and what to do with the data it returns.