* feat(google): Added support for read only access in google calendar.
By default the current read/write access will be given, but the user has the option to set read only access which stops the add event service from registering
* fix(google): Updated documentation link
* docs(google-calendar): Added style fixes
* feat(calendar-google): Updated scopes to be defined on enum property.
This was done as a MR suggestion to simplify the code.
* feat(calendar-google):Removed constants no longer needed.
* feat(calendar-google): Reduced scope check to minimum.
* style: Fixed style issues