docs(we-made-this): add serverless transactional message app

[rubenfonseca]

Issue number: #2180

Summary

Changes

Please provide a summary of what's being changed

Added the new code sample.

User experience

Please share what the user experience looks like before and after this change

Checklist

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• Meet tenets criteria
• I have performed a self-review of this change
• Changes have been tested
• Changes are documented
• PR title follows conventional commit semantics

Is this a breaking change?

RFC issue number:

Checklist:

• Migration process documented
• Implement warnings (if it can live side by side)

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[san99tiago]

Hi @heitorlessa , @rubenfonseca . I have succesfully implemented and tested the suggestions. You can double check them with this PR:

• Enabled SQS-batch processing with partial failues approach san99tiago/aws-cdk-transactional-messages#5

Let me know if additional requirements are needed. I appreciate the given feedback and taking the time to read the code!