have a feature flag to decide if we should disable user_goal_check

[wintonzheng]

[!IMPORTANT] Add feature flag to conditionally disable user goal check in agent_step() of agent.py and introduce TaskNodeParametersPanel.tsx for task node parameters.

• Behavior:
  • Adds feature flag DISABLE_USER_GOAL_CHECK in agent_step() in agent.py to conditionally disable user goal check.
  • Uses app.EXPERIMENTATION_PROVIDER.is_feature_enabled_cached to check feature flag status.
  • Skips user goal check if feature flag is enabled.
• Logging:
  • Logs when user goal is achieved and complete action is executed.
  • Logs when the feature flag is checked and its result.
• UI:
  • Adds TaskNodeParametersPanel.tsx for handling task node parameters with a multi-select component.

^{This description was created by for ec64bbd25190ef81e0ed2daee746b1cdc02aedcb. It will automatically update as commits are pushed.}