Refactor/RNG system (#476)

* Extract rng manipulation to its own file

* clang format

* Get CPU cycles since game start to use for RNG

* change a few things

* clang format

* Implement suggestions from @ricfehr3

* clang format

* Fix rebase issue

* clang format

* Create RngInfo struct to hold seed and step

* clang format

* Make a note about rng_restore system not having been tested properly yet

* Apply suggestions from @ricfehr3

Co-authored-by: Rickey <ric@rf3.xyz>

* clang format

---------

Co-authored-by: MathisMartin31 <mathis.martin31@gmail.com>
Co-authored-by: Rickey <ric@rf3.xyz>

source/main.c

@@ -6,6 +6,7 @@
 #include "gbalatro_sys8.h"
 #include "graphic_utils.h"
 #include "joker.h"
+#include "random.h"
 #include "save.h"
 #include "sprite.h"
 
@@ -24,6 +25,8 @@
 
 void init()
 {
+    rng_init();
+
     irq_init(NULL);
     irq_add(II_VBLANK, mmVBlank);
     irq_add(II_HBLANK, affine_background_hblank);