fix(ignore): cleanup logger, add waitress clear util

[Nerivec]

• Remove lambda for error since it's always called anyway
• Add ISO date to default logger (when setLogger not called, Z2M not concerned, but useful at least in testing ZH alone)
• Add clear util fn to waitress (should avoid cascading errors in scenario where the waitress should no longer be expected to resolve, like a NCP crash)
  • TODO: need to figure out if should also reject every entry when called?
  • TODO: add calls wherever appropriate (separate PRs I think)

[Koenkk]

Thanks!