ci: add github workflow to autogenerate sphinx dataset pages

[dkrako]

Description

This PR autogenerates sphinx datasets pages without requiring any dataset definition classes.

For now the datasets pages are very rudimentary, listing only the name of the dataset and a link to the dataset definition class.

Implemented changes

• create table of contents for datasets
• create templates for dataset pages
• write script to create rst files for each dataset
• extend script to create a metadata file for each dataset

How Has This Been Tested?

• test that rst files are created
• test that metadata files are created

Context

related issues:

• implement local pre-commit hooks for adding datasets #1021

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• 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
• Any dependent changes have been merged and published in downstream modules
• I have checked my code and corrected any misspellings

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (569a4df) to head (178a455).

Additional details and impacted files

@@            Coverage Diff            @@
##              main     #1147   +/-   ##
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  Coverage   100.00%   100.00%           
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  Files           93        94    +1     
  Lines         4042      4062   +20     
  Branches       715       716    +1     
=========================================
+ Hits          4042      4062   +20     

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[SiQube]