Labs: common prefix for project names so it is easier to find and delete them

[displague]

Each project should have a prefix. This prefix should be configurable through a variable.

The resultant project names would then be, for example:

"group1-me-example.com" "group1-you-example.com"

When running from a second workspace, this could be modified for clarity: "group2-someone-example.com" "group2-someoneelse-example.com"