docs: TYPE_CHECKING for injected types (#3502)

Author: tibor-reiss

docs/usage/dependency-injection.rst

@@ -53,6 +53,14 @@ the application:
 
 The above example illustrates how dependencies are declared on the different layers of the application.
 
+.. note::
+
+    Litestar needs the injected types at runtime which might clash with linter rules' recommendation to use ``TYPE_CHECKING``.
+
+    .. seealso::
+
+        :ref:`Signature namespace <signature_namespace>`
+
 Dependencies can be either callables - sync or async functions, methods, or class instances that implement the
 :meth:`object.__call__` method, or classes. These are in turn wrapped inside an instance of the
 :class:`Provide <.di.Provide>` class.