Fill in documentation gaps

[josephmckinsey]

Fill in unfinished sections

• modeler_guide/running_a_simulation/
• modeler_guide/tips_and_tricks
• modeler_guide/debugging_infeasible_models/
• modeler_guide/modeling_faq/
• model_developer_guide/adding_new_device_formulation/
• model_developer_guide/adding_new_problem_model/
• model_developer_guide/troubleshooting/
• code_base_developer_guide/troubleshooting/

The tutorials seem to help with running a simulation, but the subsections of feedforward and sequences would be helpful.

Sections on adding new device formulations and problem models would be most helpful since examples of that code are often quite complex (see ReliablePowerSimulations.jl). This is also some of the most complex code usually split across many files.

Design Decisions

• Design docs. I'm not sure if this is @jd-lara 's dissertation, but the design decisions are a bit unclear.

There's still TODOs

• Formulation library has a lot of TODOs