Add marker to _MAPPING for proper lazy loading

- Enables marker component to be discovered by Reflex's import system
- Addresses PR feedback from @adhami3310

Co-Authored-By: khaleel@reflex.dev <khaleel.aladhami@gmail.com>

Author: devin-ai-integration[bot]

reflex/__init__.py

@@ -268,7 +268,7 @@
         "memo",
         "ComponentNamespace",
     ],
-    "components.el.elements.media": ["image"],
+    "components.el.elements.media": ["image", "marker"],
     "components.lucide": ["icon"],
     **COMPONENTS_BASE_MAPPING,
     "components": ["el", "radix", "lucide", "recharts"],