Improvements to ufs-coastal documentation

[janahaddad]

Description

Currently documentation build scripts are in ufs-coastal-app repo, and require some updates, including those mentioned in #14 as well as the following comment from @uturuncoglu:

@janahaddad I think it would be nice to add link to our documentation to point following,

https://github.com/ufs-community/ufs-weather-model/wiki/Developer-Information
https://github.com/ufs-community/ufs-weather-model/wiki/Making-code-changes-in-the-UFS-weather-model-and-its-subcomponents

Solution

Opening this issue as a dedicated issue for updating the doc scripts.

Definition of Done

Let's aim for an initial decent version of the docs that is shareable and can be easily followed, even if it doesn't include everything that is ultimately needed.