Improve the usability of Result<T, E> and add new job schedule method to EntityQuery.

Added implicate conversion to Result<T, E> and RefResult<T, E>;
Added new ScheduleChunkParallel in EntityQuery;
Remove Ghost.SparseEntity from solution file. It's now completlty replaced by Ghost.Entities;

Ghost.Entities/EntityQuery.JobChunk.cs

@@ -0,0 +1,87 @@
+using Ghost.Core;
+using Misaki.HighPerformance.Jobs;
+using Misaki.HighPerformance.LowLevel.Collections;
+using System.Runtime.CompilerServices;
+
+namespace Ghost.Entities;
+
+public interface IJobChunk
+{
+    void Execute(ChunkView view, int threadIndex);
+}
+
+internal unsafe struct ChunkInfo
+{
+    public Chunk* pChunk;
+    public Archetype* pArchetype;
+}
+
+internal unsafe struct JobChunkBatch<TJob> : IJobParallelFor
+    where TJob : unmanaged, IJobChunk
+{
+
+    public TJob userJob;
+    public ReadOnlyUnsafeCollection<ChunkInfo> chunkInfos;
+
+    public void Execute(int loopIndex, int threadIndex)
+    {
+        var info = chunkInfos[loopIndex];
+        var view = new ChunkView(in *info.pArchetype, in *info.pChunk);
+
+        userJob.Execute(view, threadIndex);
+    }
+}
+
+internal struct DisposeJobChunk : IJob
+{
+    public UnsafeList<ChunkInfo> list;
+
+    public void Execute(int threadIndex)
+    {
+        list.Dispose();
+    }
+}
+
+public unsafe partial struct EntityQuery
+{
+    public JobHandle ScheduleChunkParallel<TJob>(TJob job, int batchSize, JobHandle dependency)
+        where TJob : unmanaged, IJobChunk
+    {
+        var world = World.GetWorld(_worldID).GetValueOrThrow();
+
+        var chunkInfos = new UnsafeList<ChunkInfo>(_matchingArchetypes.Count * 2, JobScheduler.TempAllocatorHandle);
+
+        foreach (var archID in _matchingArchetypes)
+        {
+            ref var arch = ref world.GetArchetypeReference(archID);
+
+            for (int i = 0; i < arch.ChunkCount; i++)
+            {
+                var pChunk = (Chunk*)arch._chunks.GetUnsafePtr() + i;
+
+                chunkInfos.Add(new ChunkInfo
+                {
+                    pArchetype = (Archetype*)Unsafe.AsPointer(ref arch),
+                    pChunk = pChunk
+                });
+            }
+        }
+
+        var batchJob = new JobChunkBatch<TJob>
+        {
+            userJob = job,
+            chunkInfos = chunkInfos.AsReadOnly()
+        };
+
+        var handle = world.JobScheduler.ScheduleParallel(ref batchJob, chunkInfos.Count, batchSize, dependency);
+
+        var disposeJob = new DisposeJobChunk
+        {
+            list = chunkInfos
+        };
+
+        world.JobScheduler.Schedule(ref disposeJob, handle);
+
+        return handle;
+    }
+}