chore: Add mypy settings to pyproject.toml

Author: yyossy5

pyproject.toml

@@ -35,3 +35,19 @@ convention = "google" # Google style docstrings
 
 [tool.ruff.lint.mccabe]
 max-complexity = 10 # Maximum cyclomatic complexity allowed for a function or method.
+
+[tool.mypy]
+python_version = "3.13"
+exclude = ["^test/"]                   # TODO: this seems to not work
+disable_error_code = ["var-annotated"]
+
+#strict = true                 # Enable strict type checking mode
+pretty = true                 # Show error messages in a more readable format
+show_error_codes = true       # Show error codes in error messages
+incremental = true            # Enable incremental mode for faster checking
+disallow_untyped_defs = true  # Disallow functions without type annotations
+disallow_untyped_calls = true # Warn about calling functions without type annotations
+no_implicit_optional = true   # Disallow implicit optional types
+warn_return_any = true        # Warn about returning Any type
+cache_dir = ".mypy_cache"     # Directory for cache files
+ignore_missing_imports = true # Skip type checking for missing imports (useful for third-party packages)