Support for both Tree of Thought (ToT) and Chain of Thought (CoT)

[vishwamartur]

Related to #71

Add support for Tree of Thought (ToT) in various classes and methods to handle both CoT and ToT workflows.

• AgentIterationStepHandler:

  • Add support for ToT in the AgentIterationStepHandler class.
  • Modify the execute_step method to handle both CoT and ToT.
  • Update the _build_agent_prompt method to support branching logic for ToT.

• AgentLlmMessageBuilder:

  • Add support for ToT in the AgentLlmMessageBuilder class.
  • Modify the build_agent_messages method to handle both CoT and ToT.
  • Update the _split_history method to support branching logic for ToT.

• AgentPromptBuilder:

  • Add support for ToT in the AgentPromptBuilder class.
  • Modify the replace_main_variables method to handle both CoT and ToT.
  • Update the replace_task_based_variables method to support branching logic for ToT.

• TaskQueue:

  • Add methods to handle branching tasks for ToT in the TaskQueue class.

• QueueStepHandler:

  • Add support for ToT in the QueueStepHandler class.

• AgentWorkflowSeed:

  • Add methods to build workflows for ToT in the AgentWorkflowSeed class.

• AgentToolStepHandler:

  • Add support for ToT in the AgentToolStepHandler class.
  • Modify the execute_step method to handle both CoT and ToT.

• IterationWorkflow:

  • Add support for ToT in the IterationWorkflow class.

• IterationWorkflowStep:

  • Add support for ToT in the IterationWorkflowStep class.
  • Modify the find_or_create_step method to handle both CoT and ToT.

• ThinkingTool:

  • Add support for ToT in the ThinkingTool class.
  • Modify the _execute method to handle both CoT and ToT.