chore: init project skeleton

Directory structure, pyproject.toml with hatchling build, and all
subpackage stubs for pyra Stage 1.

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

pyproject.toml

@@ -0,0 +1,41 @@
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
+
+[project]
+name = "pyra"
+version = "0.1.0"
+description = "Personal AI assistant CLI with vault-first security"
+requires-python = ">=3.11"
+dependencies = [
+    "litellm>=1.40.0",
+    "rich>=13.0.0",
+    "click>=8.1.0",
+    "prompt-toolkit>=3.0.0",
+    "questionary>=2.0.0",
+    "ruamel.yaml>=0.18.0",
+    "pydantic>=2.0.0",
+    "httpx>=0.27.0",
+    "python-dotenv>=1.0.0",
+]
+
+[project.optional-dependencies]
+dev = [
+    "pytest>=8.0.0",
+    "pytest-asyncio>=0.23.0",
+    "ruff>=0.4.0",
+]
+
+[project.scripts]
+pyra = "pyra.cli:main"
+
+[tool.hatch.build.targets.wheel]
+packages = ["src/pyra"]
+
+[tool.ruff]
+line-length = 100
+target-version = "py311"
+
+[tool.pytest.ini_options]
+asyncio_mode = "auto"
+testpaths = ["tests"]