feat: Add script to set balance for user

[dennis531]

Summary

Add node script set-balance to set balance of specific user. This script bases on the add-balance script. This script simplifies the implementation of a balance-accruing system so that users can be granted a balance every month, for example.

Related #4320

Change Type

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• New feature (non-breaking change which adds functionality)
• This change requires a documentation update

Testing

Please describe your test process and include instructions so that we can reproduce your test. If there are any important variables for your testing configuration, list them here.

Test Configuration:

Checklist

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• My code adheres to this project's style guidelines
• I have performed a self-review of my own code
• I have commented in any complex areas of my code
• I have made pertinent documentation changes
• My changes do not introduce new warnings
• I have written tests demonstrating that my changes are effective or that my feature works
• Local unit tests pass with my changes
• Any changes dependent on mine have been merged and published in downstream modules.
• A pull request for updating the documentation has been submitted.

[berry-13]

since this will create a duplicate

after finding the user, the script should:

1. Display their current balance first
2. If no balance amount was provided when running the script, prompt the user to enter the balance
3. If a balance amount was included when running the script, update the balance with that amount directly

this removes the redundant add-balance step and makes the flow more straightforward - either taking the balance from the initial command or prompting for it after showing the current amount