feat: add mypy schema

src/api/json/catalog.json

@@ -2756,6 +2756,12 @@
       "fileMatch": ["mycode.json"],
       "url": "https://json.schemastore.org/mycode.json"
     },
+    {
+      "name": "MyPy",
+      "description": "MyPy, a Python type checker",
+      "fileMatch": [],
+      "url": "https://json.schemastore.org/partial-mypy.json"
+    },
     {
       "name": "napari plugin manifest",
       "description": "a napari plugin manifest",

src/negative_test/pyproject/mypy-emptymodule.toml

@@ -0,0 +1,3 @@
+[[tool.mypy.overrides]]
+module = []
+disallow_untyped_defs = true

src/negative_test/pyproject/mypy-extra.toml

@@ -0,0 +1,4 @@
+# mypy global options:
+
+[tool.mypy]
+python_versions = "2.7"

src/negative_test/pyproject/mypy-nomodule.toml

@@ -0,0 +1,2 @@
+[[tool.mypy.overrides]]
+disallow_untyped_defs = true

src/schema-validation.json

@@ -768,6 +768,7 @@
         "externalSchema": [
           "cibuildwheel.json",
           "hatch.json",
+          "partial-mypy.json",
           "poetry.json",
           "ruff.json",
           "scikit-build.json",