Implement gRPC on client and server

Pending Testing

AobaServer/Utils/Extensions.cs

@@ -0,0 +1,15 @@
+using MongoDB.Bson;
+
+namespace AobaServer.Utils;
+
+public static class Extensions
+{
+	public static ObjectId ToObjectId(this string? value)
+	{
+		if(value == null)
+			return ObjectId.Empty;
+		if(ObjectId.TryParse(value, out ObjectId result))
+			return result;
+		return ObjectId.Empty;
+	}
+}