add go mod into examples to remove flowkit dependency

[ianthpun]

Closes: #???

Description

add go.mod inside examples in order to remove the cyclical dependency with flixkit

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For contributor use:

• Targeted PR against master branch
• Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
• Code follows the standards mentioned here.
• Updated relevant documentation
• Re-reviewed Files changed in the Github PR explorer
• Added appropriate labels

[turbolent]

Thank you!