feat: add grid material

thermion_dart/native/include/material/grid.S

@@ -0,0 +1,12 @@
+    .global GRID_GRID_OFFSET;
+    .global GRID_GRID_SIZE;
+
+    .global GRID_PACKAGE
+    .section .rodata
+GRID_PACKAGE:
+    .incbin "grid.bin"
+GRID_GRID_OFFSET:
+    .int 0
+GRID_GRID_SIZE:
+    .int 30210
+

thermion_dart/native/include/material/grid.apple.S

@@ -0,0 +1,12 @@
+    .global _GRID_GRID_OFFSET;
+    .global _GRID_GRID_SIZE;
+
+    .global _GRID_PACKAGE
+    .section __TEXT,__const
+_GRID_PACKAGE:
+    .incbin "grid.bin"
+_GRID_GRID_OFFSET:
+    .int 0
+_GRID_GRID_SIZE:
+    .int 30210
+

thermion_dart/native/include/material/grid.h

@@ -0,0 +1,13 @@
+#ifndef GRID_H_
+#define GRID_H_
+
+#include <stdint.h>
+
+extern "C" {
+    extern const uint8_t GRID_PACKAGE[];
+    extern int GRID_GRID_OFFSET;
+    extern int GRID_GRID_SIZE;
+}
+#define GRID_GRID_DATA (GRID_PACKAGE + GRID_GRID_OFFSET)
+
+#endif