[Model][Docs] Support Qwen3-VL-Embedding & Qwen3-VL-Reranker

[gcanlin]

What this PR does / why we need it?

Does this PR introduce any user-facing change?

How was this patch tested?

• vLLM version: v0.13.0
• vLLM main: vllm-project/vllm@2f4e654

[gemini-code-assist]

Code Review

This pull request adds documentation for Qwen3-VL-Embedding and updates the supported models list. However, the new documentation file contains several inconsistencies and placeholder content that need to be addressed. Specifically, there are errors in the document title, model names used in command examples, and a TODO for performance results. Furthermore, the supported models matrix introduces a broken link to documentation for Qwen3-VL-Reranker, as the file is not included in this PR. These issues should be resolved to ensure the documentation is accurate and complete.

[github-actions]

👋 Hi! Thank you for contributing to the vLLM Ascend project. The following points will speed up your PR merge:‌‌

• A PR should do only one thing, smaller PRs enable faster reviews.
• Every PR should include unit tests and end-to-end tests ‌to ensure it works and is not broken by other future PRs.
• Write the commit message by fulfilling the PR description to help reviewer and future developers understand.

If CI fails, you can run linting and testing checks locally according Contributing and Testing.

[gcanlin]

Waiting for upgrading to vllm-project/vllm#31890. Otherwise we can't run the Qwen3-VL-Reranker with hf_overrides.

[github-actions]

This pull request has conflicts, please resolve those before we can evaluate the pull request.

[gcanlin]

Open new PR #6034.