Reduce cross-file dependencies with forward declarations

[lolbot-iichan]

I noticed that editing some headers forces rebuilding almost whole project. This makes hard to make any refactoring.
Tested this theory by running gcc -MM -MG for cpp files and found out that there are 8300+ header imports for 200 cpp files.

Current PR suggest some quick changes that helps reduce the number of imports by 15% by using forward declarations.
Please, review commit-by-commit, not file-by-file.

There are many files changed, but almast all the changes are:

• enum is declared to extend some given type like enum SomeType: unsigned char
• include removed from header, forward declaration added instead
• include added to some cpp files that actually required the enum
• some extra includes added to some cpp files that worked automagically and broke after editing a header

Other then that there are a few changes:

• renamed enum class CScoreboard::SortType that was a member of a class to enum class ScoreboardSortType, so that it would be possible to use forward declaration
• removed default value for second StartTaskPen arg to avoid using enum element in header.
• removed member initialization at struct WheelTrace, since they are always initialized in cpp file anyway, to avoid using enum element in header.

Top 20 header import before this PR:

    110  math/const.h
    115  graphics/engine/particle.h
    118  graphics/engine/engine.h
    124  graphics/core/renderers.h
    124  graphics/core/texture.h
    127  graphics/engine/camera.h
    129  common/error.h
    130  object/interface/trace_drawing_object.h
    132  object/object_interface_type.h
    134  graphics/core/vertex.h
    135  graphics/core/type.h
    136  common/timeutils.h
    136  object/object_type.h
    136  sound/sound_type.h
    137  math/sphere.h
    141  common/logger.h
    149  common/event.h
    150  common/key.h
    169  graphics/core/color.h
    179  common/singleton.h

Top 20 header import after this PR:

     90  object/object_create_params.h
     90  object/old_object_interface.h
     91  graphics/engine/camera.h
     92  object/object_interface_type.h
    105  math/const.h
    105  sound/sound_type.h
    118  graphics/engine/engine.h
    124  graphics/core/renderers.h
    124  graphics/core/texture.h
    128  common/error.h
    134  graphics/core/vertex.h
    135  graphics/core/type.h
    136  common/timeutils.h
    136  object/object_type.h
    137  math/sphere.h
    140  common/logger.h
    149  common/event.h
    150  common/key.h
    169  graphics/core/color.h
    178  common/singleton.h