[zret] Port some documentation changes (#1164)

* zret: Documentation pass on scene/room commands #1226

* Update OTR scene

* zret: Document the lens system #1079

* zret: Misc. doc/cleanup 4 #1093

* zret: Fix misc 8 #1150

* zret: Document Distortions from z_camera and z_view #1102

soh/src/boot/stackcheck.c

@@ -72,7 +72,7 @@ void StackCheck_Cleanup(StackEntry* entry) {
     }
 }
 
-StackStatus StackCheck_GetState(StackEntry* entry) {
+s32 StackCheck_GetState(StackEntry* entry) {
     u32* last;
     size_t used;
     size_t free;

soh/src/boot/z_std_dma.c

@@ -11,7 +11,7 @@ s32 sDmaMgrCurFileLine;
 
 u32 D_80009460 = 0;
 u32 gDmaMgrDmaBuffSize = 0x2000;
-u32 sDmaMgrDataExistError = 0;
+u32 sDmaMgrIsRomCompressed = false;
 
 // dmadata filenames
 #define DEFINE_DMA_ENTRY(name) #name,
@@ -289,7 +289,7 @@ void DmaMgr_ProcessMsg(DmaRequest* req) {
     }
 
     if (!found) {
-        if (sDmaMgrDataExistError) {
+        if (sDmaMgrIsRomCompressed) {
             DmaMgr_Error(req, NULL, "DATA DON'T EXIST", "該当するデータが存在しません");
             return;
         }
@@ -385,14 +385,14 @@ void DmaMgr_Init(void) {
                        //(uintptr_t)(_dmadataSegmentRomEnd - _dmadataSegmentRomStart));
     osSyncPrintf("dma_rom_ad[]\n");
 
-    sDmaMgrDataExistError = 0;
+    sDmaMgrIsRomCompressed = false;
     name = sDmaMgrFileNames;
     iter = gDmaDataTable;
     idx = 0;
 
     while (iter->vromEnd != 0) {
         if (iter->romEnd != 0) {
-            sDmaMgrDataExistError = 1;
+            sDmaMgrIsRomCompressed = true;
         }
 
         osSyncPrintf(