feat: configure context7-mcp and proxmox-mcp as stdio servers

- Set context7-mcp restart: "no" for on-demand execution
- Add context7-mcp to crush.json mcp configuration
- Fix proxmox-mcp Dockerfile to use python module directly
- Update proxmox-mcp entrypoint to "python -m proxmox_mcp.server"
- Add git dependency for proxmox-mcp git+ dependencies
- Remove --frozen flag (no lock file available)

dockerfiles/proxmox-mcp/Dockerfile

@@ -1,5 +1,8 @@
 FROM python:3.12-slim
 
+# Install git for git+ dependencies
+RUN apt-get update && apt-get install -y git && rm -rf /var/lib/apt/lists/*
+
 # Install uv for faster package management
 COPY --from=ghcr.io/astral-sh/uv:latest /uv /uvx /bin/
 
@@ -9,16 +12,16 @@ WORKDIR /app
 COPY pyproject.toml ./
 
 # Install dependencies
-RUN uv sync --frozen --no-dev --no-install-project --no-cache
+RUN uv sync --no-dev --no-install-project --no-cache
 
 # Copy source code
 COPY . .
 
 # Install the project
-RUN uv sync --frozen --no-dev --no-editable --no-cache
+RUN uv sync --no-dev --no-editable --no-cache
 
 # Set up environment
 ENV PYTHONUNBUFFERED=1
 ENV PATH=/app/.venv/bin:$PATH
 
-ENTRYPOINT ["uvx", "proxmox-mcp"]
+ENTRYPOINT ["python", "-m", "proxmox_mcp.server"]