Refactor process module

[evabl444]

We need to refactor the current process module into a ProcessODP, covering the general notions of processes, transformation, phases and steps, order, plan and execution. Then add the current process module (with the taxonomy) as the extension of that.

[huanyu-li]

I just added processODP now. But more detailed modeling of transformation, phases and steps, order, plan are still needed.