Adds C bridges to LUS C++ code to their own files. Additionally organizes headers for more organic includes. (#29)

* Removes unused extern definition for __osMaxControllers in SDLController.cpp

* Moves libultraship functions to their own files.

* Headers are now moved to include and adds bridge functions for basic LUS functionality.

* Updates PulseAudioPlayer to have our naming convenstions and runs clang-format.

* Updates clang-tidy headers.

* Moves GameOverlay to menu directory.

* Fixing naming conventions in PulseAudioPlayer.

* Fixes clang-tidy errors in ResourceMgr.

* Fixes include of GameOverlay.h

* GameOverlay screen dimensions are now protected access.

* Fixes gbi.h includes.

* AudioPlayer.doInit -> AudioPlayer.DoInit

* Excluding os.h from clang-tidy

* Include stddef.h in libultraship.h for size_t

* Includes studded.h in AudioPlayer.h for size_t

* Includes stddef.h in audioplayerbridge.h for size_t

* Removes unnecessary includes in LUS.h

* Libultra types now includes stddef which brings a long size_t for all platforms.