As a first priority, we optimized the Select tool to perform all of these transformations (thanks to the handles/gizmo that appears whenever you have an object selected).
Now we’re planning on adding individual Translate, Rotate, and Scale tools. These tools work a bit differently because they allow you to click anywhere in empty space to perform the transformation (no need to click directly on the object).
This is currently already implemented with the Translate tool if you want to try it out.
Shortcuts are placeholder, though they will be related to the ability to also set a key for these properties (probably with a different modifier). #151