refactor: Standardize naming conventions (#47)

* refactor: Standardize naming conventions

* chore: Update the version and re-run experiments

* chore: Improve code quality tooling and documentation

- Add pre-commit job to CI workflow for automated linting on PRs
- Update uniface/__init__.py with copyright header, module docstring,
  and logically grouped exports
- Revise CONTRIBUTING.md to reflect pre-commit handles all formatting
- Remove redundant ruff check from CI (now handled by pre-commit)
- Update build job Python version to 3.11 (matches requires-python)

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "uniface"
-version = "1.6.0"
+version = "2.0.0"
 description = "UniFace: A Comprehensive Library for Face Detection, Recognition, Landmark Analysis, Face Parsing, Gaze Estimation, Age, and Gender Detection"
 readme = "README.md"
 license = { text = "MIT" }
@@ -89,13 +89,60 @@ exclude = [
 
 [tool.ruff.format]
 quote-style = "single"
-
+docstring-code-format = true
 
 [tool.ruff.lint]
-select = ["E", "F", "I", "W"]
+select = [
+    "E",      # pycodestyle errors
+    "F",      # pyflakes
+    "I",      # isort
+    "W",      # pycodestyle warnings
+    "UP",     # pyupgrade (modern Python syntax)
+    "B",      # flake8-bugbear
+    "C4",     # flake8-comprehensions
+    "SIM",    # flake8-simplify
+    "RUF",    # Ruff-specific rules
+]
+ignore = [
+    "E501",   # Line too long (handled by formatter)
+    "B008",   # Function call in default argument (common in FastAPI/Click)
+    "SIM108", # Use ternary operator (can reduce readability)
+    "RUF022", # Allow logical grouping in __all__ instead of alphabetical sorting
+]
 
 [tool.ruff.lint.flake8-quotes]
 docstring-quotes = "double"
 
 [tool.ruff.lint.isort]
+force-single-line = false
+force-sort-within-sections = true
 known-first-party = ["uniface"]
+section-order = [
+    "future",
+    "standard-library",
+    "third-party",
+    "first-party",
+    "local-folder",
+]
+
+[tool.ruff.lint.pydocstyle]
+convention = "google"
+
+[tool.mypy]
+python_version = "3.11"
+warn_return_any = false
+warn_unused_ignores = true
+ignore_missing_imports = true
+exclude = ["tests/", "scripts/", "examples/"]
+# Disable strict return type checking for numpy operations
+disable_error_code = ["no-any-return"]
+
+[tool.bandit]
+exclude_dirs = ["tests", "scripts", "examples"]
+skips = ["B101", "B614"]  # B101: assert, B614: torch.jit.load (models are SHA256 verified)
+
+[tool.pytest.ini_options]
+testpaths = ["tests"]
+python_files = ["test_*.py"]
+python_functions = ["test_*"]
+addopts = "-v --tb=short"