Mask improvements (#3431)

* Add gKeepMasks

* Add gSaveMasksToFile

* Add gKeepMasksOnDeath & gKeepBunnyHoodThroughTime

* Fix mask bleedthrough

* Update cvar names

* Change bunny hood enhancements to all mask ones

* Consolidate multiple enhancements into PersistentMasks

* Move keeping masks thru loading zones to PersistentMasks

* I forgot

* Update z_player.c

* Update z64save.h

Merge commit excluded this removal for some reason.

---------

Co-authored-by: Malkierian <malkierian@gmail.com>
Co-authored-by: Malkierian <malkierian@live.com>

soh/src/code/z_sram.c

@@ -140,6 +140,10 @@ void Sram_OpenSave() {
             break;
     }
 
+    if (!CVarGetInteger(CVAR_ENHANCEMENT("PersistentMasks"), 0)) {
+        gSaveContext.maskMemory = PLAYER_MASK_NONE;
+    }
+
     osSyncPrintf("scene_no = %d\n", gSaveContext.entranceIndex);
     osSyncPrintf(VT_RST);