Change SvcGetInfo 5 to return actual heap size, remove AMemoryAlloc since it is no longer needed with direct memory access, move some memory management logic out of AMemoryMgr, change default virtual filesystem path to AppData

ChocolArm64/Memory/AMemoryMapInfo.cs

@@ -1,6 +1,6 @@
 namespace ChocolArm64.Memory
 {
-    public struct AMemoryMapInfo
+    public class AMemoryMapInfo
     {
         public long Position { get; private set; }
         public long Size     { get; private set; }