Vendor Harness Core and add Phase B ESP32 OCR handoff

[MengzhangLI]

What changed

• Vendors the complete Assistive Harness Core into OpenGlass: FunASR, Router, state machine, Skill YAML/prompts, telemetry and tests.
• Adds the stable Rokid Phase B entry point with PC-speaker V1.1 behavior, model text logging, one-shot task injection and shutdown handling.
• Adds the Phase A browser thin-adapter assets without overwriting an upstream MiniCPM omni-app.js.
• Adds a transport-neutral CVObservation/provider contract, non-blocking capacity-one shadow pipeline, YOLO ONNX reference provider and OCR provider template.
• Adds an explicit ModelScope download helper; runtime --model-path remains a local path and never downloads implicitly.
• Expands the Chinese handoff guide with clean-clone setup, exact startup commands, OCR extension path, and a table of intentionally external model/runtime assets.

Why

Make this OpenGlass branch the shared Phase B / Rokid / ESP32 / OCR collaboration baseline so a colleague can clone it directly instead of receiving an incomplete local MiniCPM directory archive.

Scope and safety

• Experimental obstacle awareness and CV are shadow-only; observations do not control navigation or motion.
• MiniCPM-o/llama.cpp-omni Worker/Gateway and large model weights remain external dependencies.
• ASR, YOLO and OCR weights are deliberately excluded from Git and have documented local download/placement paths.
• Unrelated local files are excluded.

Validation

• Assistive Harness Core + Rokid Phase B: 30 passed.
• OpenGlass perception pipeline: 3 passed.
• Phase A browser adapter: 7 passed.
• YOLO provider smoke test: test discovered; skipped when optional local ONNX weights are absent.
• Harness server CLI/import smoke test passed.