Implement ConfigManager

[wessle]

It would be nice to have a working version of this to test with ExperimentRunner once the latter is almost done being debugged.

[wessle]

Now that we have standard YAML config file formats for specifying trials and experiments (see issue #29), we need to implement a ConfigManager that can automatically translate back and forth between the YAML config files and live ConfigTuples to be used at runtime. This is important not only so it's easier to specify experiments, but also because we need to save a copy of the corresponding trial config file alongside the results of each trial for ease of identification and replication.

[wessle]

Progress

The experiment_runner_* scripts in the examples directory on experiments now save YAML config files alongside each trial's output.

TODO:

• Create a ConfigManager that implements the config file parsing contained in experiment_runner_experiment_config.py
• Use the above to hide all config file parsing from the user by putting ConfigManager inside ExperimentRunner
• Update the ExperimentRunner drawio diagram to reflect these changes