This moves all the things and rules logic away from NymeaCore
into their respective modules where it belongs.
One major change is the removal of the removePolicy functionality.
This was somewhat broken as it was only working for rules but not
for all the other modules like scripts, experiences etc. After
an attempt to create something that works with all modules it
really seemed that this does not make a lot of sence after all,
given that updating rules would in most cases leave something
very broken behind and removing them was the only sane thing to do.
On the other hand, experience plugins may not work well with such
a policy eithre as they may require to do their own special thing.
So in the end the removePolicy was dropped altogether. Apps should
instead figure out themselves what removal of a thing may imply and
inform the user about that beforehand.
Removes the indoorairquality and airquality interfaces as the
plugin isn't the right place for these sort of voncersion.
Instead, this PR specifies the individual compounds that
for the base for air quality measurements and ties them down
to export raw data.
It's the client apps responsibility to translate those values
into Air Quality Index scales based on the location of user. I.e.
while Europe would use the CAQI (Common Air Quality Index), the
US would use the EPA AQI etc.
It can happen that a plugin calls finish() in a slot which normally would be dispatched before the timeout
but due to high system load the slot is invoked only after the timeout. This in turn would cause Qt to also queue up
this timeout slot and by the time the system processes slots, the plugin comes in first and we'd fire an aborted()
signal in the plugin after it called finish(), potentially badly breaking the plugin as a plugin developer would not
expect this to happen. So we'll have to verify here that the plugin did not finish() by now before aborting.
nymea:app already implements this and many plugins do too. Apparently
most of the radiator thermostats support this, so it's worth making it
part of the interface.
