Generate message source files from IDL during build

[aaronchongth]

Feature request

Description

Instead of committing the generated message source files into the repository, they should be generated, compiled and linked during build.

Implementation considerations

Avoid using ament macros as this package will need to support non-ROS 2 systems.

Examples,

• https://github.com/autowarefoundation/ansys-vrxperience-ros2/blob/d651222092a7c8a27e472c43ac075be51d2aa359/vrxperience_bridge/CMakeLists.txt
• https://github.com/OSLL/Middleware_testing/blob/ee0273d9caadeb2b416ba59917ffa253a509884e/CycloneDDS/CMakeLists.txt
• https://github.com/eboasson/i11eperf/blob/c7b94a3e0829a8d3af1956c6aa7ebfc91ea88138/CMakeLists.txt