Add formatting and type checks

pyproject.toml

@@ -33,7 +33,9 @@ Issues = "https://github.com/StasonJatham/karldns.de/issues"
 
 [project.optional-dependencies]
 dev = [
+  "black>=26.5.1",
   "httpx>=0.28",
+  "mypy>=2.1.0",
   "pytest>=8.2",
   "ruff>=0.8",
 ]
@@ -55,3 +57,15 @@ target-version = "py311"
 [tool.ruff.lint]
 select = ["E", "F", "I", "UP", "B"]
 ignore = ["E501"]
+
+[tool.black]
+line-length = 120
+target-version = ["py311"]
+
+[tool.mypy]
+python_version = "3.11"
+files = ["karldns"]
+check_untyped_defs = true
+warn_unused_ignores = true
+warn_redundant_casts = true
+show_error_codes = true