Add examples that show other workflows to run H2I

We only show one workflow in most of the examples (load the overall config into H2Integrate model and run from there), and there are a lot of other ways that people can set up running H2I, especially when running a study.

One way is to load all the three individual configs first, change what you want to change, then instantiate H2Integrate with a dictionary instead of a yaml file.

This alternative workflow would be useful as some things are set when you initialize with the H2Integrate model and require extra work to be updated after that. For example, updating the recorder path would be easier before initialization rather than having to do the extra steps below:

Start with the existing examples that load the overall configuration into the H2Integrate model, then trace how the three individual configurations can be loaded and passed as a dictionary. Add an example showing this alternative workflow, including changes made before initialization such as the recorder path, and verify that the example runs successfully.