Move all custom types into modules/types/ with each type having own header

[martinandrovich]

Maybe have a separate directory such as modules/types/ for all custom types, such that struct lidar_t is defined in modules/types/lidar.h. A common include file could be used to include all common types, i.e. #include "module/types/common.h, instead of including all header files manually.

EDIT: Started work; populating the /modules/types/ directory. The file /modules/types/common.h will include all custom types + using defines. Furthermore, a modules/constants.h file will be added.

All classes/structs must also be made thread-safe, in accordance with #3.

• [x] constants.h
• [ ] common.h
• [x] pose.h (pos_t, orient_t, pose_t, vel_t)
• [x] lidar.h (lidar_t)
• [x] camera.h (camera_t)

[martinandrovich]

I propose that each type is fully implemented in its own, single .h file, something like:

#pragma once

// delcarations
class mytype_t
{
public:
    std::atomic<int> a;
    std::atomic<float> b;

private:
   void hello();
};

// definitions
inline void
mytype_t::hello()
{
    return;
}

[martinandrovich]

Also create a constants.h for, well, constants in the core:: namespace.