feat: scaffold project structure

Add pyproject.toml, pytest.ini, .env.example, app package layout (shared/pipeline/api/cron), and test skeleton.

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

pyproject.toml

@@ -0,0 +1,33 @@
+[build-system]
+requires = ["setuptools>=68"]
+build-backend = "setuptools.backends.legacy:build"
+
+[project]
+name = "linkedstorm"
+version = "0.1.0"
+requires-python = ">=3.12"
+dependencies = [
+    "fastapi==0.115.0",
+    "uvicorn[standard]==0.30.6",
+    "pydantic-settings==2.4.0",
+    "httpx==0.27.2",
+    "websockets==13.1",
+    "resemblyzer==0.1.1.dev0",
+    "silero-vad==5.1.2",
+    "torch==2.4.1",
+    "numpy==1.26.4",
+    "livekit-api==0.7.2",
+    "scipy==1.14.1",
+]
+
+[project.optional-dependencies]
+dev = [
+    "pytest==8.3.3",
+    "pytest-asyncio==0.24.0",
+    "pytest-mock==3.14.0",
+    "httpx==0.27.2",
+]
+
+[tool.setuptools.packages.find]
+where = ["."]
+include = ["app*"]