Refresh readme.md

[rogerxfeng8]

Essential Elements of an Effective PR Description Checklist

• The purpose of the PR, such as "Fix some issue (link existing issues this PR will resolve)".
• The test plan, such as providing test command.
• The test results, such as pasting the results comparison before and after, or e2e results
• (Optional) The necessary documentation update, such as updating supported_models.md and examples for a new model.

readme.md update.

[Copilot]

Pull request overview

Updates README.md to provide a more complete project overview and clearer guidance for installation, usage, testing, benchmarks, and design rationale.

Changes:

• Expanded README with table of contents and clearer “About”/“Supported Kernels” sections.
• Added structured installation/build instructions plus testing and benchmark usage.
• Refined design notes explaining the rationale for statically linking oneDNN.

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[Copilot]

The README lists PyTorch: 2.10.0+xpu as a requirement, but the build system currently expects torch 2.9.0 for XPU (see CMakeLists.txt TORCH_SUPPORTED_VERSION_XPU). This mismatch is likely to confuse users and may lead to builds running with an unsupported torch version; please align the README requirement with the version(s) actually supported by the build (or update the build checks if 2.10 is now the intended target).

Suggested change

	- **PyTorch**: 2.10.0+xpu
	- **PyTorch**: 2.9.0+xpu

[rogerxfeng8]

The CMakLists.txt needs to be updated for TORCH_SUPPORTED_VERSION_XPU to 2.10

[jikunshang]

pls fix pre-commit issue, also add this for developer https://docs.vllm.ai/en/latest/contributing/?h=lint#linting

[baodii]

LGTM