Add functionality to allow the Micro Manager to initialize micro simulations from different file/solver sources simultaneously

[IshaanDesai]

Currently the Micro Manager accepts one micro simulation file (with Python or C++ code) and initializes all micro simulation objects with it. In certain applications, a user may want to initialize more than one micro simulations simultaneously. For example, at some macro locations, high fidelity micro simulations may be necessary, while at other macro locations, low fidelity micro simulations would be sufficient.

As a first step, such a dynamic setup can be done at the time of initialization, and it will not change during the simulation.