Add mem0 sample, bug fixes and more tests. - #11914

Description

• Add a sample to show how to use the mem0 component
• Fix some bugs and add more tests
• Removed the clear memory tool, since it is flakey and getting invoked when it shouldn't be.
• Can reintroduce later if we find a way to do this safely

Contribution Checklist

• The code builds clean without any errors or warnings
• The PR follows the SK Contribution Guidelines and the pre-submission formatting script raises no violations
• All unit tests pass, and I have added new tests where possible
• I didn't break anyone 😄