Add DA_Ephys checkbox to write data into separate NWB file

[t-b]

• Add setvariable string with pattern name, %exp-%hw-%electrode, (%exp: experiment name, %hw: hardware serial, %electrode: electrode name) current default being %exp
• Add NWB function to regenerate NWB file name
• Add GUI group for NWB settings

[t-b]

New solution: Always use one NWB file per device, see https://github.com/AllenInstitute/MIES/issues/978#issuecomment-2261163347.

[MichaelHuth]

For all data: NWB_ExportAllData if user loaded an (old) pxp and exports all data to nwb

Per sweep: SWS_SaveAcquiredData through NWB_AppendSweepDuringDAQ

Add device name as suffix in filename