feat: StructuredOutput returns list of Data objects when multiple=True

[elephantum]

Description

This PR proposes a change in Structured Output behavior when Generate Multiple is set to true.

Currently when Generate Multiple is used component produces a single Data entry with single key objects which contains a string representation of a json list of records. This is a bit counterintuitive because Langflow supports input and output of lists of Data objects.

Solution

We propose to change semantics of Structured Output to return a list Data objects when Generate Multiple is enabled

[ogabrielluiz]

Hey @elephantum

I like this. Thank you!

What if we made this component have two different outputs?

This change is good but it is a breaking change.

[elephantum]

@ogabrielluiz hey, thanks for taking a look.

Indeed, I do not understand in detail how to deal with backwards compatibility in Langflow.

I will keep original output as is and add list as a new output structured_output_list maybe?

[autofix-ci]

Hi! I'm autofix.ci, a bot that automatically fixes trivial issues such as code formatting in pull requests.

I would like to apply some automated changes to this pull request, but it looks like I don't have the necessary permissions to do so. To get this pull request into a mergeable state, please do one of the following two things:

1. Allow edits by maintainers for your pull request, and then re-trigger CI (for example by pushing a new commit).
2. Manually fix the issues identified for your pull request (see the GitHub Actions output for details on what I would like to change).

[elephantum]

@ogabrielluiz please, take another look, I added methods for all possible types of output :)