S71500 update/v3 0 (#24)
* library update S7-1500 Firmware Version V3.0
New Methods supported:
DataLogs.DownloadAndClear
Files.Browse
Files.Create
Files.CreateDirectory
Files.Delete
Files.DeleteDirectory
Files.Download
Files.Rename
Plc.CreateBackup
Plc.ReadSystemTime
Plc.ReadTimeSettings
Plc.RestoreBackup
New Comfort Methods:
DirectoryBuilder
DirectoryHandler
FileHandler
FileResourceBuilder
TicketHandler
* Keep: Added .net6.0 & .net7.0 target frameworks & update to latest packages. (#23)
* add webappmanager (old version but doesnt matter)
