[FR] implement interval-time node

[Hypnos3]

additional to the time-inject node a time-interval note seems to be good idea with the configuration possibilities:

• allow to define a interval in milliseconds, seconds, minutes, hours
• allow to define a payload with all possibilities of the time-inject node
• two main configuration possibilities
  • interval only - starts on node start
  • interval between two time stamps
    • define a start and a end time with all possibilities of the time-inject node (sun time, moon time , ...)
    • limitations to the time (even, odd day, day of the week, month, etc...) - interval will only start on start timestamp if no limitation

Why not enhance the time-inject node?
This will be overload the time-inject node, so an extra node would be better.