Revert "and the rest.."

This reverts commit 0104d7a062fe1df9c522e31444f79b1e1184be42.
Revert "Revert "and the rest..""

This reverts commit 687db155cfb29ff4968ffd3bd5953af4977203cf.
file structure and TRE workspace
another try to commit the file structure
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TRE UML