Split z64.h: move various things, state, sram, gfx, jpeg, prerender, speedmeter (#1487)

* Split z64.h more

* fix speedmeter.h (expect this kind of issue resolution to pop up eventually)

* fix z64object.h

* fix z64state.h

* fix (probably only partially) z64play.h

* fix fix speedmeter.h :)

* revert making a play header (sadge), add/split transition & transition_instances

* move stuff to cutscene, interface

* Move `TransitionCircle%` enums to `z64transition_instances.h`

* z64state.h -> z64game.h with a "this is not final" comment

* forward declare GraphicsContext in z64game.h instead of including the header file for it

* don't comment on where the forward declarations are from

reasoning:
1) it's easy to go out of sync (like this comment, it was outdated anyway)
2) any IDE can easily find the struct anyway

src/code/flg_set.c

@@ -1,5 +1,10 @@
 #include "global.h"
 
+typedef struct {
+    /* 0x00 */ u16* value;
+    /* 0x04 */ const char* name;
+} FlagSetEntry; // size = 0x08
+
 void FlagSet_Update(PlayState* play) {
     static s32 entryIdx = 0;
     static u32 curBit = 0;

src/code/speed_meter.c

@@ -56,6 +56,13 @@ volatile OSTime D_8016A578;
 // Accumulator for `gRDPTimeTotal`
 volatile OSTime gRDPTimeAcc;
 
+typedef struct {
+    /* 0x00 */ volatile OSTime* time;
+    /* 0x04 */ u8 x;
+    /* 0x05 */ u8 y;
+    /* 0x06 */ u16 color;
+} SpeedMeterTimeEntry; // size = 0x08
+
 SpeedMeterTimeEntry* sSpeedMeterTimeEntryPtr;
 
 SpeedMeterTimeEntry sSpeedMeterTimeEntryArray[] = {

src/code/ucode_disas.c

@@ -1,5 +1,34 @@
 #include "global.h"
 
+typedef struct {
+    /* 0x00 */ u32 value;
+    /* 0x04 */ const char* name;
+} F3dzexConst; // size = 0x8
+
+typedef struct {
+    /* 0x00 */ u32 value;
+    /* 0x04 */ const char* setName;
+    /* 0x08 */ const char* unsetName;
+} F3dzexFlag; // size = 0x0C
+
+typedef struct {
+    /* 0x00 */ const char* name;
+    /* 0x04 */ u32 value;
+    /* 0x08 */ u32 mask;
+} F3dzexRenderMode; // size = 0x0C
+
+typedef struct {
+    /* 0x00 */ const char* name;
+    /* 0x04 */ u32 value;
+} F3dzexSetModeMacroValue; // size = 0x8
+
+typedef struct {
+    /* 0x00 */ const char* name;
+    /* 0x04 */ u32 shift;
+    /* 0x08 */ u32 len;
+    /* 0x0C */ F3dzexSetModeMacroValue values[4];
+} F3dzexSetModeMacro; // size = 0x2C
+
 typedef void (*UcodeDisasCallback)(UCodeDisas*, u32);
 
 #define F3DZEX_CONST(name) \