Memory Changes

* Refactors the RangeList and derivative classes used for handling lists of regions

* The Binary searches are now more performant, relying on edge searches instead of just returning the first matching hit and manually iterating until the edge is found

* Most look-ups now return a RangeItem, which acts as a linked list node now, instead where possible, moving away from Array copies. This should help with some specific lag spikes.

* Made IntrusiveRedBlackTreeNodes act like linked list nodes too to improve the lookup time of minimums, maximums and successors.

* Changed a few cases of HasFlag() into binary operations to save on memory allocations.

In general, [these changes] should increase frame time stability and lag spikes, but at the cost of some overhead to memory look-ups, the result being a very slightly better average fps from my testing (~1-2%).

src/Ryujinx.Graphics.Gpu/Memory/MemoryManager.cs

@@ -690,11 +690,8 @@ namespace Ryujinx.Graphics.Gpu.Memory
             if (_pageTable[l0] == null)
             {
                 _pageTable[l0] = new ulong[PtLvl1Size];
-
-                for (ulong index = 0; index < PtLvl1Size; index++)
-                {
-                    _pageTable[l0][index] = PteUnmapped;
-                }
+                
+                Array.Fill(_pageTable[l0], PteUnmapped);
             }
 
             _pageTable[l0][l1] = pte;