Feature #2/gha ci - Githubissues

Starting with a draft PR to test out the documentation build step.

Expected Differences

[x] Do these changes modify the system output in any way? [No]
If yes, please describe:

[x] Describe testing already performed for these changes:
- This GHA run was triggered by this PR and it passed.
- This GHA run demonstrates that a warning (intentionally added) does result in a failure:
```
/home/runner/work/wrfcloud/wrfcloud/docs/index.rst:8: WARNING: image file not readable: _static/wrfcloud_banner_photo_web.BADPATH.jpeg
...
Error: Process completed with exit code 1.
```
[x] Recommend testing for the reviewer(s) to perform, including the location of input datasets, and any additional instructions:
Confirm that you see red X for this GHA run but a green checkmark for that most recent GHA run.
[x] Do these changes include sufficient documentation updates, ensuring that no errors or warnings exist in the build of the documentation? [No] Made no actual docs updates. We do not document our CI process anywhere, at least not yet.
[x] Do these changes include sufficient testing updates? [Yes] That's what this is!
[x] Will this PR result in changes to the test suite? [No]
If yes, describe the new output and/or changes to the existing output:
[ ] Please complete this pull request review by [???].

[x] Review the source issue metadata (labels, project, and milestone).
[x] Complete the PR definition above.
[x] Ensure the PR title matches the feature or bugfix branch name.
[x] Define the PR metadata, as permissions allow. Select: Reviewer(s) Select: Project Select: Milestone as the version that will include these changes Select: Development to link to the original development issue.
[ ] After the PR is approved, merge your changes. If permissions do not allow this, request that the reviewer do the merge.
[ ] Close the linked issue and delete your feature or bugfix branch from GitHub.