implemented unicode support and generation of font atlas texture

helper.c

@@ -70,6 +70,14 @@ Matrix4x4 orthographic_projection_2d(float left, float right, float bottom, floa
     return result;
 }
 
+uint wide_str_len(const wide_str *text) {
+  uint len = 0;
+  for (uint i = 0; text[i] != '\0'; i++) {
+    len++;
+  }
+  return len;
+}
+
 int max(int a, int b) {
     return a > b ? a : b;
 }