adds a robust digital scan that has some error handling

Maybe useful for bad chips or misbehaving communication under SEU measurements

TBD:

• Disentangle chip.init() from chip.init_communication() in ITkPixV1 to be able to re-init without masks reset
• Change 5 s sleep to 0.1 s sleep (value from Mark). Only proceed error handling via chip.init() if an additional link check fails and log something with self.log
• Put chip.init() in a while loop, in-case it fails
• Make the errors that trigger chip.init() configurable via scan parameters. As a std. setting omit SOFT errors.
• Remove/optimize sleeps
• [ ] Maybe: Check also for empty data in the is_rx_ok function and just send CLEAR. Of cause log this.
• Optimize sleeps in scan loop