Add LocalMode to awesome-transformers.md

[MuathJ]

This PR adds LocalMode to awesome-transformers.md.

LocalMode is a local-first AI toolkit (MIT) that runs models entirely in the browser — no servers, no API keys, and data never leaves the device. Transformers.js is one of its core inference backends (alongside WebLLM, wllama, LiteRT, MediaPipe, and Chrome Built-in AI), wrapped behind a zero-dependency core that adds embeddings, vector search, RAG, and agents, plus React hooks and a shadcn-compatible UI registry.

• Repo: https://github.com/LocalMode-AI/LocalMode
• Docs: https://localmode.dev
• Live demos (run entirely in your browser): https://localmode.ai/blocks

The list's README invites PRs adding relevant projects, and Transformers.js — which LocalMode builds on — is already featured. Thanks for maintaining this list!

[github-actions]

Thank you for your contribution 🤗!

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• A new high-severity security issue was detected in the changed Python files (Bandit check)

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