Partial Simulation

[LinqLover]

see #todo comment

Next steps:

• [ ] have a look at Context>>#quickStep and see how it can help us - are we reinventing a 🎡 here?
• [ ] investigate cause of VM crashes during debugging
• [ ] improve support for exception handling
• [ ] create specializations in #wantsToSimulate: (maybe pluggable for better reuse?) to support scenarios such as #53 or https://github.com/hpi-swa-lab/squeak-tracedebugger/issues/39
• [ ] add tests

Will close #54.

[LinqLover]

Testing sample: TestObject3.st.txt