Draft: Snapcraft implementation

This MR works towards addressing the snap packaging that is mentioned in #35. As of right now, this is packaged using the deb package from the ppa, but it should be converted over to use the cmake plugin from source. I would like to get the dbus helper service working before spending too much time troubleshooting the build process. Currently the helper fails to start which prevents corectrl from running.

I can modify the git history before merging, but for now, it would be helpful to have some feedback 😄