Fix issue #345: Add warnings for migration

examples/openhands-resolver.yml

@@ -1,5 +1,7 @@
 name: Resolve Issue with OpenHands
 
+# ALERT: message from your friendly neighborhood code agent -> this is an old version of the OpenHands github resolver. It has been moved to https://github.com/All-Hands-AI/OpenHands/tree/main/openhands/resolver
+
 on:
   issues:
     types: [labeled]

openhands_resolver/__init__.py

@@ -1 +1,11 @@
 __version__ = "0.3.1"
+
+import warnings
+
+warnings.warn(
+    "\nDEPRECATION WARNING: This is an old version of the OpenHands resolver. "
+    "It has been moved to https://github.com/All-Hands-AI/OpenHands/tree/main/openhands/resolver\n"
+    "Please update your dependencies to use the new version.",
+    DeprecationWarning,
+    stacklevel=2
+)