serialize experimental for api enabled features (#182)

Author: miguelg719

stagehand/api.py

@@ -66,6 +66,9 @@ async def _create_session(self):
     if hasattr(self, "model_client_options") and self.model_client_options:
         payload["modelClientOptions"] = self.model_client_options
 
+    if hasattr(self, "experimental") and self.experimental:
+        payload["experimental"] = self.experimental
+
     def get_version(package_str):
         try:
             result = version(package_str)

stagehand/main.py

@@ -263,7 +263,7 @@ def __init__(
         self.context: Optional[StagehandContext] = None
         self.use_api = self.config.use_api
         self.experimental = self.config.experimental
-        if self.experimental or self.env == "LOCAL":
+        if self.env == "LOCAL":
             self.use_api = False
         if (
             self.browserbase_session_create_params