fully split / more work on d_com_inf_game (#81)

* split d_com_inf_game

* fix func name

* start some dcomifg funcs

* fix

* clang-format

* change dComIfGs_setWarpItemData back to inline asm for now

Co-authored-by: Pheenoh <pheenoh@gmail.com>

include/d/d_bg/d_bg_s/d_bg_s.h

@@ -5,6 +5,7 @@
 #include "global.h"
 #pragma pack(push, 1)
 class cBgS_ChkElm {
+    cBgS_ChkElm(void);
     /* 0x00 */ dBgW_Base* bgw_base_pointer;
     /* 0x04 */ u8 used;
     /* 0x05 */ u8 padding[3];