start to redo metal shader compilation

projects/apis/metal/src/shader_module/metal_shader_compiler.h

@@ -0,0 +1,9 @@
+#pragma once
+#include "stdint.h"
+#include "stdlib.h"
+
+typedef struct mtlShaderOptions {
+
+} mtlShaderOptions;
+
+const char* mtlCompileShader(uint32_t* code, size_t size, mtlShaderOptions* options);