Teamone webarena agents fully implemented. (#276)

* Initial onboarding of WebArena
* Migrate to try_get_underlying_agent_instance
* Fixed some race conditions and implemented Deactivate messages.

python/benchmarks/WebArena/Scripts/custom_tabulate.py

@@ -0,0 +1,15 @@
+import os
+import sys
+from autogenbench.tabulate_cmd import default_tabulate, default_scorer
+
+
+def scorer(instance_dir, success_strings=["FINAL SCORE: 1"]):
+    return default_scorer(instance_dir, success_strings=success_strings)
+
+
+def main(args):
+    default_tabulate(args, scorer=scorer)
+
+
+if __name__ == "__main__" and __package__ is None:
+    main(sys.argv)