Remove mise.toml and update 'engines' in package.json

[kevinb-khan]

Summary:

Now that the global mise config is specifying Node 24.13 we no longer need the repo-specific mise.toml files. This PR also updates the 'engines' field in package.json to expect at least Node 24.13.

Issue: FEI-7566

Test plan:

• node -v, see 24.13
• let CI run checks

[changeset-bot]

🦋 Changeset detected

Latest commit: 83cd273

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 0 packages

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[khan-actions-bot]

Gerald

Required Reviewers

• @Khan/frontend-infra for changes to package.json, .changeset/spotty-years-stop.md

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[github-actions]

Size Change: 0 B

Total Size: 4.22 kB

ℹ️ View Unchanged

Filename	Size
packages/wonder-stuff-core/dist/browser/es/index.js	1.52 kB
packages/wonder-stuff-sentry/dist/browser/es/index.js	1.6 kB
packages/wonder-stuff-testing/dist/browser/es/index.js	1.1 kB

_{compressed-size-action}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 83.15%. Comparing base (74ddde6) to head (83cd273).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1239   +/-   ##
=======================================
  Coverage   83.15%   83.15%           
=======================================
  Files          63       63           
  Lines         843      843           
  Branches      209      210    +1     
=======================================
  Hits          701      701           
  Misses        142      142           

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