Increase Dbscan Result Visibility and Optimize Code Performance

[yusufuzun]

Create a new class for containing all the information happening inside Dbscan algorithm process.

• [x] Create a new compute cluster result type to contain dbscan process information.
• [x] Update ComputeClusterDbscan method to return a new result type.
• [x] Rename parameters and arguments accordingly
• [x] Move MyCustomDatasetItem to DbscanDemo project