adding in wcsession

[bassrock]

Goal

Add in watch connectivity framework for connectivity.

ToDO

• figure out how to update complication from wcsession
• should we use a better store on the watch?

[creepymonster]

Thank you so much <3, I haven't had enough time the last few months, I'll have a look at the PR. I will do that in the next few days.

Many greetings
Reimar

[mitchross]

@bassrock does this allow for direct readings from Freestyle libre 2 to apple watch?