Add xarray resources and VSCode extensions to docs

[tomvothecoder]

Description

This PR adds xarray resources and VSCode extensions to docs. It also removes mentions of GH Actions publishing docs since RTD handles this.

• Closes Add xarray resources (e.g., extending xarray) #38
• Closes Remove section about GitHub Actions publishing docs #36

How Has This Been Tested?

• Local Pre-commit Checks
• CI/CD Build

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• My changes generate no new warnings
• Any dependent changes have been merged and published in downstream modules

If applicable:

• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I have noted that this is a breaking change for a major release (fix or feature that would cause existing functionality to not work as expected)