chore: add config for mypy

Author: badmonster0

pyproject.toml

@@ -9,7 +9,12 @@ description = "With CocoIndex, users declare the transformation, CocoIndex creat
 authors = [{ name = "CocoIndex", email = "[email protected]" }]
 readme = "README.md"
 requires-python = ">=3.11"
-dependencies = ["sentence-transformers>=3.3.1", "click>=8.1.8", "rich>=14.0.0", "python-dotenv>=1.1.0"]
+dependencies = [
+    "sentence-transformers>=3.3.1",
+    "click>=8.1.8",
+    "rich>=14.0.0",
+    "python-dotenv>=1.1.0",
+]
 license = "Apache-2.0"
 urls = { Homepage = "https://cocoindex.io/" }
 
@@ -23,4 +28,9 @@ module-name = "cocoindex._engine"
 features = ["pyo3/extension-module"]
 
 [project.optional-dependencies]
-test = ["pytest"]
+test = ["pytest"]
+
+[tool.mypy]
+python_version = "3.11"
+# Disable for not as we have missing type annotations. See https://github.com/cocoindex-io/cocoindex/issues/539
+#   strict = true