Auto-Create Target Table and Add Output Preview for Table Merge Function

NetBrain currently requires users to manually create a global table with defined rows and columns before it can be set as the target table in the Merge Parsed Table with ADT function, adding setup complexity to an otherwise routine automation task. The merge function also provides no preview of its output, so users must build and run a diagnosis workflow just to confirm the merged results are correct. This enhancement would allow the merge function to automatically create the output table, similar to prior product behavior, and would add a preview capability so users can view merge results without executing a full diagnosis. Reducing setup steps and enabling faster validation would help customers build and troubleshoot automation more efficiently.