Update main.py so add() returns id of new memory along with message in returned dict.

[strueman]

changed add(): .......... return {"message": "ok"} to add(): ......... return {"message": "ok", "id":function_result} so that the memory id of the newly created memory is returned in the dict. This is to allow external code to access memory ids when required without having an extra search step for each added memory.

Description

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Fixes # (issue)

Type of change

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• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] Refactor (does not change functionality, e.g. code style improvements, linting)
• [ ] Documentation update

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• [ ] Unit Test
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Checklist:

• [ ] My code follows the style guidelines of this project
• [x] I have performed a self-review of my own code
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• [ ] I have made corresponding changes to the documentation
• [x] My changes generate no new warnings
• [ ] I have added tests that prove my fix is effective or that my feature works
• [ ] New and existing unit tests pass locally with my changes
• [ ] Any dependent changes have been merged and published in downstream modules
• [x] I have checked my code and corrected any misspellings

Maintainer Checklist

• [ ] closes #xxxx (Replace xxxx with the GitHub issue number)
• [ ] Made sure Checks passed

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[strueman]

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