doc: Update README.md

[junrushao]

[Rendered]

[gemini-code-assist]

Summary of Changes

Hello @junrushao, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request significantly enhances the README.md file by updating existing content with more illustrative examples and direct links, and by introducing a comprehensive "Getting Started" section. The changes aim to improve the clarity and accessibility of information for new and existing users, making it easier to understand TVM FFI's capabilities and how to begin using it.

Highlights

• Documentation Links Refinement: The main documentation link was streamlined, removing the direct quickstart link from the header to consolidate navigation.
• Enhanced Examples and References: Added specific examples like FlashInfer, TileLang, and cuteDSL to illustrate the application of Kernel libraries and DSLs, and provided direct links for Python, C++, and Rust interop in ML infrastructure.
• New Getting Started Section: Introduced a dedicated "Getting Started" section with clear installation instructions for apache-tvm-ffi and torch-c-dlpack-ext, along with direct links to essential documentation pages like Quick Start, Stable C ABI, and Python Packaging.

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[gemini-code-assist]

Code Review

This pull request updates the README.md file to improve its structure and provide more context for new users. It adds a 'Getting Started' section with installation instructions and key documentation links, and also includes links to external projects that use TVM FFI. The changes are a good improvement. My review includes a few suggestions to fix some malformed Markdown links and a potentially broken URL anchor to ensure all links work as expected.