Restoring Docs PR after Github closed it

[gbarter]

Purpose

Clean up and revise the example inputs and documentation.

• Added a few placeholder doc pages (dlc_generator, optimization, weis_outputs)
• Updated notes on developing python modules in WEIS
• Combined WISDEM and WEIS inputs into single rst files (still need to add these to readthedocs, and they are not 100% complete)
• Add examples/00_setup/get_wisdem_yamls.py to pull relevant geometry inputs from WISDEM
• Pared down input files to only those necessary to run examples. Also reduced unnecessary inputs from individual files. Some examples reference other examples.
• Made it so that outputs are written relative to the analysis_options.yaml input.
• Added initial conditions for the openfast-only cases. @ptrbortolotti
• Fixed bug in l_fill to RAFT, where density was not properly set.

Type of change

What types of change is it?
Select the appropriate type(s) that describe this PR

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (non-backwards-compatible fix or feature)
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no API changes)
• Documentation update
• Maintenance update
• Other (please describe)

Testing

Explain the steps needed to test the new code to verify that it does indeed address the issue and produce the expected behavior.

Checklist

Put an x in the boxes that apply.

• I have run existing tests which pass locally with my changes
• I have added new tests or examples that prove my fix is effective or that my feature works
• I have added necessary documentation

[gbarter]

@dzalkind - Seems like this is ready to go?

[dzalkind]

Yes, it can be ready to go, but there is always more to document. How about I work on it until Wednesday COB, and then we merge?

[dzalkind]

@ptrbortolotti, I'm not as familiar with examples 05, 07, and 08 as you are. I added placeholder READMEs. Do you want to expand or save for later?

Also, should we pull BAR_USC.yaml from somewhere like the others?

[dzalkind]

@AthulKrishnaSundarrajan, I added a placeholder README in example 14_level2ccd. Do you want to add anything there while we're here? Should anything in 13_DTQP be updated?

[AthulKrishnaSundarrajan]

@AthulKrishnaSundarrajan, I added a placeholder README in example 14_level2ccd. Do you want to add anything there while we're here? Should anything in 13_DTQP be updated?

Readme for 13_DTQP looks good. For 14_level2ccd, I'll work on the readme and a tutorial on how to use LPV models and DTQPy

[ptrbortolotti]

my apologies for the delays @dzalkind ! I should have now addressed your (good) comments

[dzalkind]

Only the Windows CI tests are failing, which we can address in a future PR.