Summary

This PR streamlines the root README.md and moves detailed setup and trace content into the documentation site and FAST25-release/, so the README stays a concise entry point while full guides remain easy to find.

Motivation

The root README had grown long, with setup details duplicated between the README and the docs. This change:

1. Makes the README easier to scan for new visitors.
2. Keeps detailed instructions in one place (the documentation site).
3. Keeps trace-related content co-located under FAST25-release/.

PR Content

README improvements

• Overview: Remove the redundant architecture diagram and long narrative; replace with a shorter, component-focused description (Transfer Engine, Mooncake Store, Mooncake EP & PG).
• Getting Started (formerly Quick Start): Keep only essential pip install commands; link to the docs for prerequisites, source builds, deployment, and other accelerator backends.
• AI Assistant Skills: Collapse the skills table and plugin install instructions into a <details> block to reduce visual clutter.
• Open Source Traces: Move trace JSON samples into FAST25-release/README.md; summarize traces in the README and link to FAST25-release, plus the KV Cache Size Calculator and Hit Rate Simulator tools.
• Citation: Surface the FAST'25 paper as the primary citation; move other papers into a collapsible "More" section.

Documentation sync

• Move the "Before using Mooncake" prerequisites and expanded installation notes (CUDA 13, NPU, package variants, runtime dependencies) from the README into docs/source/getting_started/quick-start.md.

New file

• Add FAST25-release/README.md with trace sample format and release notes (content previously inline in the root README).

Changes