chore(project): add pyproject.toml and project configuration

Configure Python project with pydantic, structlog, typer, rich dependencies.
Set up ruff, mypy, pytest tooling with strict type checking.

pyproject.toml

@@ -0,0 +1,121 @@
+[project]
+name = "veritext"
+version = "0.1.0-dev"
+description = "Semantic text validation framework"
+readme = "readme.md"
+requires-python = ">=3.11"
+license = "MIT"
+authors = [{ name = "Kai Chappell", email = "git@kschappell.com" }]
+keywords = ["validation", "text", "nlp", "testing", "quality"]
+classifiers = [
+    "Development Status :: 3 - Alpha",
+    "Intended Audience :: Developers",
+    "License :: OSI Approved :: MIT License",
+    "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.13",
+    "Topic :: Software Development :: Testing",
+    "Topic :: Text Processing",
+    "Typing :: Typed",
+]
+dependencies = [
+    "pydantic>=2.0",
+    "pydantic-settings>=2.0",
+    "structlog>=23.0",
+    "typer>=0.9",
+    "rich>=13.0",
+]
+
+[project.optional-dependencies]
+semantic = ["sentence-transformers>=2.2"]
+dev = [
+    "pytest>=7.0",
+    "pytest-cov>=4.0",
+    "mypy>=1.0",
+    "ruff>=0.1",
+]
+all = ["veritext[semantic]"]
+
+[project.scripts]
+veritext = "veritext.cli.main:app"
+
+[project.entry-points.pytest11]
+veritext = "veritext.pytest_plugin"
+
+[project.urls]
+Repository = "https://gitea.kschappell.com/kschappell/veritext"
+
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
+
+[tool.hatch.build.targets.wheel]
+packages = ["src/veritext"]
+
+[tool.ruff]
+line-length = 88
+target-version = "py311"
+src = ["src", "tests"]
+
+[tool.ruff.lint]
+select = [
+    "E",      # pycodestyle errors
+    "W",      # pycodestyle warnings
+    "F",      # pyflakes
+    "I",      # isort
+    "B",      # flake8-bugbear
+    "C4",     # flake8-comprehensions
+    "UP",     # pyupgrade
+    "ARG",    # flake8-unused-arguments
+    "SIM",    # flake8-simplify
+    "TCH",    # flake8-type-checking
+    "PTH",    # flake8-use-pathlib
+    "RUF",    # ruff-specific
+]
+ignore = [
+    "E501",   # line too long (handled by formatter)
+]
+
+[tool.ruff.lint.isort]
+known-first-party = ["veritext"]
+
+[tool.mypy]
+python_version = "3.11"
+mypy_path = ["src"]
+strict = true
+warn_return_any = true
+warn_unused_ignores = true
+disallow_untyped_defs = true
+disallow_incomplete_defs = true
+check_untyped_defs = true
+disallow_untyped_decorators = true
+no_implicit_optional = true
+warn_redundant_casts = true
+warn_unused_configs = true
+show_error_codes = true
+files = ["src/veritext"]
+
+[[tool.mypy.overrides]]
+module = ["sentence_transformers.*"]
+ignore_missing_imports = true
+
+[[tool.mypy.overrides]]
+module = ["structlog", "structlog.*"]
+ignore_missing_imports = true
+
+[tool.pytest.ini_options]
+testpaths = ["tests"]
+addopts = "-v --tb=short"
+pythonpath = ["src"]
+
+[tool.coverage.run]
+source = ["src/veritext"]
+branch = true
+
+[tool.coverage.report]
+exclude_lines = [
+    "pragma: no cover",
+    "if TYPE_CHECKING:",
+    "raise NotImplementedError",
+]