chore: scaffold companion project with deps and config

pyproject.toml

@@ -0,0 +1,27 @@
+[project]
+name = "companion"
+version = "0.1.0"
+description = "Personal companion AI with local RAG"
+requires-python = ">=3.11"
+dependencies = [
+    "pydantic>=2.0",
+    "lancedb>=0.9.0",
+    "pyarrow>=15.0.0",
+    "requests>=2.31.0",
+    "watchdog>=4.0.0",
+    "typer>=0.12.0",
+    "rich>=13.0.0",
+    "numpy>=1.26.0",
+]
+
+[project.optional-dependencies]
+dev = [
+    "pytest>=8.0.0",
+    "pytest-asyncio>=0.23.0",
+    "httpx>=0.27.0",
+    "respx>=0.21.0",
+]
+
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"