Request for global autoconnect of ROS foundation snaps

Hey @artivis ,

Before proceeding, can you please rename the content attribute value of each of the snaps so then it is clear for plugging snaps what they are connecting to? e.g. I see you have the same:

slots:
  ros-foxy:
    interface: content
    content: ros-foxy
    read:
    - /

for the 3 ros-foxy-desktop, ros-foxy-ros-base and ros-foxy-ros-core. Same thing for the other set of snaps.

This discussion should help if this is still not clear.