Add movement relative to time

Previously movement was based on frames rather than
time. I added time_get_dt() function for getting time
since last frame and changed rotation speed to use this
function.

Signed-off-by: Piotr Krygier <piotrkrygier@everyonecancode@xyz>

red_scarf_engine/src/main.c

@@ -3,6 +3,7 @@
 #include "graphics/rse_graphics.h"
 #include "utilities/errors_common.h"
 #include "SDL3/SDL_thread.h"
+#include "utilities/time_utils.h"
 
 
 int main(int argc, char** argv)
@@ -15,6 +16,7 @@ int main(int argc, char** argv)
 
     SDL_SetLogPriorities(SDL_LOG_PRIORITY_VERBOSE);
 
+    STATUS_CHECK(time_init());
     STATUS_CHECK(rse_graphics_init(&context));
     STATUS_CHECK(rse_graphics_test_function(context));