Use zbus to register the bus name.
Use async_std to get dbus session connection.
Added missing interface_name in SmDbusApi.
Removed parameters from SmDbusApi since those are passed, but not
kept with the method definition, etc.
Added some structures, enums, etc. to hold the data we will need.
Added an initialize_apis that only looks for config files so far.
TODO:
Use zbus to create our service, register the name, etc. to start.
Decide on a config file format (maybe after getting some zbus
details fleshed out and knowing better what will fit well)
Add error messages and don't fail on errors, just log them.
