Improve testing framework

Replaced Criterrion with CMock. Added few tests, currently not working
properly. Random test upgrades.

tests/src/rse_graphics_window_tests.h

@@ -0,0 +1,17 @@
+/**
+ * @file rse_graphics_window_tests.h
+ * @author Piotr Krygier (everyonecancode@gmail.com)
+ * @brief Tests for rse_graphics module
+ * @version 0.1
+ * @date 2024-02-16
+ *
+ * @copyright Copyright (c) 2024
+ *
+ */
+
+#ifndef RSE_GRAPHICS_TESTS_H
+#define RSE_GRAPHICS_TESTS_H
+
+void rse_graphics_window_tests(void);
+
+#endif // RSE_GRAPHICS_TESTS_H