[MINOR] Handle multiple responses are returned from MCP

[navinpai]

When MCP server returns multiple returns (especially in streamable-http MCP servers), mcpadapt CrewAIAdaper only returns the first response. This minor PR collates all the responses text into a list and returns the entire response to CrewAI so it can use the entire response.

Tested with crewai==0.165.1

Note: This issue was also reported in #55

[navinpai]

@grll can you please take a look at this? 🙏

[grll]

@grll can you please take a look at this? 🙏

Hey thanks a lot for the contribution. Sorry for the delay I will try to review ASAP

[grll]

If we go for the backward compatible change then, this would mean we can revert the test and just add a new test to check that multiple value get a string representation of the list with all the values.

Also if you feel like it you could add a warning similar to smolagents adapter about the the fact that we only support text.

[grll]

looks good thank you for making the change. I would just remove the single content test as I think it is anyway already tested above that case. Then we should be good to merge. Thanks again!

[grll]

@navinpai thank you for the change! Merged and released in v0.1.15