advanced auto-reconnect

[benoitj]

ERC has basic auto reconnect, but will not try on failure

this feature is to:

1. implement a method that detects if ERC is connected or not
2. implement a timer based call to detect if ERC is disconnected
3. /reconnect if it's not connected

the timer should have a:

1. initial delay to start looking (configurable). this is to avoid reconnecting before we even started the bot
2. a time internal to check for connection status (configurable)

this must be implemented as a ERC module and built with a re-use intent