Add WeWork XiaoAi TTS bot - WeChat Work long connection bridge

Receives messages from WeChat Work bot via WebSocket long connection
and speaks them through XiaoAi smart speaker TTS.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Dockerfile

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+FROM python:3.11-slim
+
+WORKDIR /app
+
+# Install system deps (none needed for this project, just pip)
+RUN pip install --no-cache-dir \
+    aiohttp>=3.9.0 \
+    python-dotenv>=1.0.0 \
+    miservice_fork>=2.9.0
+
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+COPY app/ app/
+COPY config.py run.py ./
+
+# Don't COPY .env or .mi.token — they're mounted at runtime
+
+CMD ["python", "run.py"]