Update use cases in index.md for Prithvi-EO-2.0 and Terramind, enhancing clarity and detail on model releases

Add sections on LLM ecosystem continuation and Nous Research in index.md and index.html, improving content structure and clarity

Revise content in index.md and index.html for non-transformer architectures, updating examples and improving clarity

Update index.md to enhance structure and clarity, including revised subtitles, added usage section, and improved content organization

Revise content in index.md and index.html for clarity and structure, including updates on user demand, open source projects, and future vision