Split first 3 boards

Also introduce board executor file. Renamed w10dll splits.

src/REL/board_executor.c

@@ -1,7 +1,7 @@
-#include "include/REL/w10Dll.h"
+#include "REL/board_executor.h"
 
-void fn_1_0(void) {
-    BoardInit(&fn_1_E0, &fn_1_6D8);
+static void InitBoard(void) {
+    BoardCommonInit(BoardInit, BoardDestroy);
 }
 
 int _prolog(void) {
@@ -10,7 +10,7 @@ int _prolog(void) {
         (**ctors)();
         ctors++;
     }
-	fn_1_0();
+	InitBoard();
     return 0;
 }
 

src/REL/w10Dll/main.c

@@ -65,7 +65,7 @@ inline s32 get_current_board(void) {
     return GWSystem.board;
 }
 
-void fn_1_E0(void) {
+void BoardInit(void) {
     f32 sp10;
     f32 spC[2];
     s32 sp8;
@@ -138,7 +138,7 @@ void fn_1_E0(void) {
     HuWinMesPalSet(lbl_1_bss_E, 7, 0, 0, 0);
 }
 
-void fn_1_6D8(void) {
+void BoardDestroy(void) {
     s32 i;
     for (i = 0; i < 1; i++) {
         if (lbl_1_bss_10[i] != 0) {