Add sim.h/.c add stub for orca_run()

Makefile

@@ -8,7 +8,7 @@ library_flags := -lncurses
 else
 library_flags := -lncursesw
 endif
-source_files := field.c main.c
+source_files := field.c sim.c main.c
 
 all: debug
 

base.h

@@ -10,3 +10,9 @@
 typedef char Term;
 typedef uint32_t U32;
 typedef int32_t I32;
+
+typedef struct {
+  Term* buffer;
+  U32 height;
+  U32 width;
+} Field;

field.h

@@ -1,12 +1,6 @@
 #pragma once
 #include "base.h"
 
-typedef struct {
-  Term* buffer;
-  U32 height;
-  U32 width;
-} Field;
-
 void field_init_zeros(Field* f, U32 height, U32 width);
 void field_init_fill(Field* f, U32 height, U32 width, Term fill_char);
 void field_resize_raw(Field* f, U32 height, U32 width);

sim.c

@@ -0,0 +1,5 @@
+#include "field.h"
+#include "sim.h"
+
+void orca_run(Field* f) {
+}

sim.h

@@ -0,0 +1,4 @@
+#pragma once
+#include "base.h"
+
+void orca_run(Field* f);