OARO 1D documentation

[luohezhiming]

Fixes/Resolves:

(replace this with the issue # fixed or resolved, if no issue exists then a brief statement of what this PR does)

Summary/Motivation:

Add documentation for OARO1d model

Changes proposed in this PR:

• add oaro1d doc
• revise oaro0d doc to be consistent with the current settings

Legal Acknowledgement

By contributing to this software project, I agree to the following terms and conditions for my contribution:

1. I agree my contributions are submitted under the license terms described in the LICENSE.txt file at the top level of this directory.
2. I represent I am authorized to make the contributions and grant the license. If my employer has rights to intellectual property that includes these contributions, I represent that I have received permission to make contributions and grant the required license on behalf of that employer.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (0454198) 94.24% compared to head (0a1bbf7) 94.24%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1261   +/-   ##
=======================================
  Coverage   94.24%   94.24%           
=======================================
  Files         360      360           
  Lines       36276    36276           
=======================================
  Hits        34188    34188           
  Misses       2088     2088           

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