Add Documentation for Conditional Dataset Scheduling with dag-factory

[ErickSeo]

Closes: #361

This PR adds a comprehensive guide on conditional dataset scheduling using dag-factory (v0.22.0+) and Airflow 2.9+. Key updates include:

Explanation of conditional dataset scheduling and its use cases.
Requirements for using the feature.
Examples demonstrating configurations with both string and YAML syntax.
Visual diagrams illustrating dataset condition logic.
This documentation is intended to help users understand and implement conditional dataset scheduling effectively in their workflows.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.01%. Comparing base (98fffa2) to head (90ae2e6).
Report is 1 commits behind head on main.

Additional details and impacted files

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[tatiana]

This looks great, thanks a lot, @ErickSeo , for follow up on the documentation!

[yanmastin-astro]

LGTM!

[pankajastro]

We want to clean REAME file. I know the dataset feature we have not documented yet but I'm wondering if it makes sense to move this changes in /docs folder so that would be appear in our main docs: https://astronomer.github.io/dag-factory/latest/ ?

[ErickSeo]

I'm going to move the documentation from the README to the docs folder.
Would it make sense to clean up the entire section referencing the dataset from the README and move it to the docs as well?

[pankajastro]

Would it make sense to clean up the entire section referencing the dataset from the README and move it to the docs as well?

Yes, if you can do this, it would be great.

[ErickSeo]