feat: scaffold fable-mcp Python package

pyproject.toml with mcp[cli]/httpx/python-dotenv deps, entry point
fable-mcp=fable_mcp.server:main, dev deps for testing.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

fable-mcp/.env.example

@@ -0,0 +1,2 @@
+FABLE_URL=http://localhost:5000
+FABLE_API_KEY=fmcp_your_key_here

fable-mcp/pyproject.toml

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+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
+
+[project]
+name = "fable-mcp"
+version = "0.1.0"
+description = "MCP server for Fabled Assistant"
+requires-python = ">=3.12"
+dependencies = [
+  "mcp[cli]>=1.0",
+  "httpx>=0.27",
+  "python-dotenv>=1.0",
+]
+
+[project.scripts]
+fable-mcp = "fable_mcp.server:main"
+
+[project.optional-dependencies]
+dev = ["pytest>=8.0", "pytest-asyncio>=0.23", "respx>=0.21"]
+
+[tool.pytest.ini_options]
+asyncio_mode = "auto"
+testpaths = ["tests"]

fable-mcp/tests/conftest.py

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+"""Shared pytest fixtures for fable-mcp tests."""
+from unittest.mock import AsyncMock, MagicMock
+import pytest
+
+
+@pytest.fixture
+def mock_client():
+    """A mock FableClient that returns empty responses by default."""
+    client = AsyncMock()
+    client.__aenter__ = AsyncMock(return_value=client)
+    client.__aexit__ = AsyncMock(return_value=False)
+    return client