Add GettingStarted for Dummies

[Cirromulus]

CTRL-Shift-P, dings und bums

[DarthBubi]

Added first version of a README. Need dummies for testing. :P

[DarthBubi]

What's the opinion of @hemker, @sebhell and @PimpMyPizza on this?

[PimpMyPizza]

@DarthBubi I've setup the workspace as defined in the README today. Worked almost fine for me. Just the last step is not working, because I don't see the command "ROS: Run a ROS launch file (roslaunch)

After installing the vscode plugin "ROS" from Microsoft, I could then see the command

but launching the pilsbot_simulation file failed and put some errors.

[DarthBubi]

Strange, the ROS extension is part of the defined workspace. It sometimes requires reloading after the initial setup. I'll add a line regarding this issue to the README.
The errors look quite strange. A failing Gazebo points to a non present XServer forwarding to the container. @PimpMyPizza, can you investigate if this is the case?