restructure zephr

zephr.h

@@ -0,0 +1,22 @@
+#pragma once
+
+#include <stdbool.h>
+
+#include "text.h"
+
+typedef struct Context {
+  bool should_quit;
+  Color clear_color;
+  Size screen_size;
+  Size window_size;
+  ZephFont font;
+
+  Matrix4x4 projection;
+} Context;
+
+int init_zephr(const char* font_path, const char* window_title, Size window_size, Color *clear_color);
+void deinit_zephr();
+bool zephr_should_quit();
+void zephr_swap_buffers();
+Size zephr_get_window_size();
+void zephr_make_window_non_resizable();