docs: update latest news section in README files for qnn aot

[chenghuaWang]

Summary by CodeRabbit

• New Features

  • Announced MLLM Qnn AOT support for full-graph execution on NPU with Quick Start and technical resources.

• Documentation

  • Added documentation notes on optional environment path configuration for QNN backend.

[coderabbitai]

Caution

Review failed

The pull request is closed.

📝 Walkthrough

Walkthrough

The changes add a new news announcement for 2026-02-03 about MLLM Qnn AOT's full-graph execution on NPU across both English and Chinese README files, adjust formatting on an existing 2025-11-23 news entry, and add documentation comments to the QNN AOT execution guide.

Changes

Cohort / File(s)	Summary
README Updates README.md, README-ZH.md	Added 2026-02-03 news entry announcing MLLM Qnn AOT support for full-graph execution on NPU; removed flame emoji emphasis from 2025-11-23 "MLLM v2 released!" entry.
Documentation docs/qnn_backend/aot_execute.rst	Added two commented lines documenting optional QNN environment path configuration and corresponding command-line flag.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Suggested reviewers

• xumengwei
• liang1232018
• yirongjie

Poem

🐰 Fresh news hops in with NPU cheer,
MLLM Qnn AOT's debut this year!
Flames trimmed from old tales with care,
Comments documented, crisp and fair,
README gardens blooming everywhere! 🌱

✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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