Pandas WEB: Add table of content for the Ecosystem page

We did it for the PDEP pages here: #58791

I don't think it should be difficult to also add a table of contents for the ecosystem page, which is quite large and not so easy to find things

Comment From: akafle01

Hi, I would like to work on this.

Comment From: Priya09153

Hi, priya here I would like to work on this issue

Comment From: Veneel77

take