Summary: Elastic introduces Streams for observability

Why It Matters: Elastic is making it easier to find answers in logs. This could help users solve problems faster.

What Changed:

• Added a new section: "Live logs and prosper" with "Introducing Streams: your first stop for investigations. Less pipeline, more answers."
• Added new links for Streams: "Understand our vision" and "Get started".
• Removed a news item about "Level up your Elastic expertise for free".
• Removed a news item about "Elastic Security dominates AV‑Comparatives test".
• Removed a news item about "Lighter by default: ES optimizes vector data".
• Added a news item about "ELSER now available on EIS".
• Added a news item about "Sear-ious performance without memory limits DiskBBQ".
• Added a news item about "Build context-aware agents on Elasticsearch".
• Changed the order of "Generative AI" and "Search" sections.
• Updated some URLs from https://www.elastic.co/ to https://elastic.co/.