Updating the save mechanism by creating an intermediary SaveData struct (#472)

* Make save changes their own branch

* Make SaveData tags char[] instead of u32[]

* Make Game and Options data saving independent

* removed unused functions

* Potential fix for pull request finding

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

* mark save sections as valid only after they are actually written to SRAM

* fix comparison between different integer types

* Implement some suggestions from @ricfehr3

* Add extensive documentation on the structure of the savefile

* fix doxygen doc generation

* fix it again

---------

Co-authored-by: MathisMartin31 <mathis.martin31@gmail.com>
Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

source/game/options_menu.c

@@ -473,7 +473,7 @@ static void back_on_pressed(void)
 {
     if (back_btn_is_save_state)
     {
-        save_game();
+        save_options();
         change_back_save_text(true);
         back_btn_is_save_state = false;
     }