Add data science demos to landing page

[freddyaboulton]

Description

Fixes #2048

Added two demos:

• Time series forecasting with Prophet
• XGBoost Classification with Explainability

Forecasting, Prophet, Tabular datasets, and Prediction Explainability are all concepts that have come up in our conversations with data scientists (both internal and external) and these demos cover those concepts.

My hope is that putting them in the front page will catch the eyes of prospective data science users. The xgboost example is a sneak peek of what we want to be able to automate for skops models.

Checklist:

• I have performed a self-review of my own code
• My code follows the style guidelines of this project
• I have commented my code 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

[github-actions]

All the demos for this PR have been deployed at https://huggingface.co/spaces/gradio-pr-deploys/pr-2067-all-demos

[abidlabs]

Thoughts on shortening the titles so that they fit better and roughly match the length of the titles of the first 3 demos?

Suggested change

	Time Series Forecasting With Prophet
	Time Series Forecasting

[freddyaboulton]

Sure thing! I was just trying to use eye catching terms lol

[abidlabs]

Suggested change

	XGBoost Classification with Explainability
	XGBoost Classification

[abidlabs]

Looks great @freddyaboulton! Suggest shortening the titles so that they all fit in one line.

Original:

New:

Also, it seems we are missing code skeletons for the last 2 demos? For the sake of consistency, I think it would be good to include the skeletons.

[freddyaboulton]

@abidlabs Good point re the code skeleton!

I deliberately left them out since they are blocks demos and would need more code than the other demos on the landing page. I thought it would be distracting. If we want to include the code skeleton for blocks, what's the right amount? How about the following?

with gr.Blocks() as demo:
   # your forecasting demo here
demo.launch()

[abidlabs]

I see, that's a good point. I think that's one option, although the code snippet doesn't really add much.

What about leaving out the code snippet then but adding some text that says, "see full code here" and then linking to https://huggingface.co/spaces/gradio/timeseries-forecasting-with-prophet/tree/main? Is it possible to do that in a way that doesn't distract from the demo?

[abidlabs]

Oh nvm you already do that in the demos! Haha that's cool. I'll make some suggestions about the Spaces via PRs on the demos themselves but this LGTM :)