feat - verbosity level

[JarbasAl]

i propose adding a new concept of VerbosityLevel

this would correspond to a integer from 0 - 10, added to Session

• 0 corresponds to the default, it means a skill should speak only essential messages
• 10 corresponds to the skill speaking a lot, ideally explaining everything it is doing along the way

a skill would check for self.verbosity_level (session aware) and conditionally speak more messages, backwards compat is retained

if self.verbosity_level > 3:
    self.speak("extra info")
if self.verbosity_level >= 9:
    self.speak("extra very redundant info")

using session allows verbosity level to be set per client (such as hivemind voice satellites), the default value would come from mycroft.conf as usual. a companion skill can also be made to control this by voice

[mike99mac]

0 corresponds to the default, Just my two cents - I set the default to 1, and use 0 for "silent mode".

[JarbasAl]

0 is the minimum ammount of speech, and needs to correspond to current behavior for compat reasons

if a self.speak is optional then the skill dev can require other verbosity level, we should not force 0 to mean silent, some messages might be mission critical and very important

dont want the carbon monoxide leak detector to not speak because you said "good night mycroft" right?