pyproject.toml: Enable mypy.disallow_any_generics

Add disallow_any_generics = true to the mypy configuration. This
requires all generic types (dict, list, Iterable, Types, etc.) to
have explicit type arguments instead of using bare generic aliases.

Assisted-by: unsloth/Qwen3.6-35B-A3B-GGUF:IQ4_NL and pi.dev 0.81.1
Signed-off-by: Jan Lindemann <jan@janware.com>

conf/templates/pyproject.toml

@@ -6,6 +6,8 @@
 
   strict_equality = true
 
+  disallow_any_generics = true
+
   enable_error_code = [
     "explicit-override",
     "ignore-without-code",