Add "sideEffects" into package.jsons

[chrisbbreuer]

Clear and concise description of the problem

We aren't really using it.

Suggested solution

• [ ] Add "sideEffects" into package.jsons

Alternative

No response

Additional context

No response

Validations

• [X] Follow our Code of Conduct
• [X] Read the Contributing Guide
• [X] Check that there isn't already an issue that requests the same feature (to avoid creating a duplicate)