Migrate to jotai-family as suggested

[kmcginnes]

Description

Migrated atomFamily from the deprecated jotai/utils to the new jotai-family package. The API is identical, so only the import statements needed updating.

Jotai docs

Validation

• Smoke test

Related Issues

• Resolves Migrate Jotai atomFamily use #1445

Check List

• I confirm that my contribution is made under the terms of the Apache 2.0
  license.
• I have run pnpm checks to ensure code compiles and meets standards.
• I have run pnpm test to check if all tests are passing.
• I have covered new added functionality with unit tests if necessary.
• I have added an entry in the Changelog.md.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 62.20%. Comparing base (c5affc5) to head (be283ad).
⚠️ Report is 24 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #1446       +/-   ##
===========================================
+ Coverage   47.81%   62.20%   +14.38%     
===========================================
  Files         382      306       -76     
  Lines        8525     6336     -2189     
  Branches     3159     2219      -940     
===========================================
- Hits         4076     3941      -135     
+ Misses       3070     1680     -1390     
+ Partials     1379      715      -664     

Flag	Coverage Δ
unittests	62.20% <ø> (+14.38%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.