fix: chat input must return text by default and output should accept Record, Message and str types

[nicoloboschi]

chat input:

• it should use return_message default to False to keep backwards compatibility

chat output:

• it should accepts all the combinations as expected: record, message and string

To reproduce the issue you can simply connect a chat input with a chat output.

[vercel]

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Name	Status	Preview	Comments	Updated (UTC)
langflow	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jun 19, 2024 2:08pm

[nicoloboschi]

I'm finding more issues, I'll make this PR as draft

[vercel]

Deployment failed with the following error:

Resource is limited - try again in 8 seconds (more than 100, code: "api-deployments-free-per-day").

[vercel]

Deployment failed with the following error:

Resource is limited - try again in 9 minutes (more than 100, code: "api-deployments-free-per-day").

[vercel]

Deployment failed with the following error:

Resource is limited - try again in 5 minutes (more than 100, code: "api-deployments-free-per-day").