[BUG] The output format of an LLM agent is different from other agents

[vizsatiz]

Describe the bug The output of an agent of the type LLM is a string where as the outputs of other agents are a list. which is essentially the sequential chat history

To Reproduce Steps to reproduce the behavior:

1. Create a simple LLM and invoke.
2. Print results to observe

Expected behaviour All agent kinds should have the same kind of output

Environment (please complete the following information):

• python version: 3.10
• OS: mac
• flo-ai version: 0.0.4