Implement Test Microscope

[Harrison-Oatman]

Implement a testing environment for PyCLM dry runs

Experiment planning and testing should not always require access to a microscope. The test microscope environment should allow users to dry run a multi-experiment from a directory, and evaluate:

• Whether the directory is set up correctly
• How data flow will reach their custom pattern/segmentation models
• When and which commands will be sent to the microscope
• How their custom pattern/segmentation models will respond to inputs and generate outputs

This test environment can be used without access to a microscope or a working MicroManager configuration.

The MicroscopeProcess will interface with a dummy core, but all other processes will behave as usual.

A user should be able to provide mock data for the microscope to substitute for actual acquisition.

@jgubbens is leading this feature branch.