ci: adopt Node.js 24 and update GitHub Actions; refresh dev types

[FenPWysocki]

Changes

• CI: Use Node 24 (Active LTS) in test workflow and release workflow.
• Actions: Upgrade actions/checkout and actions/setup-node to v6 in test and action.yml.
• GitHub Script: Upgrade to v8 in action.yml.
• Dev types: Update @types/node@24.10.4 and undici-types@7.16.0 in package-lock.json.

Checklist

• I have read the Auth0 general contribution guidelines
• I have read the Auth0 Code of Conduct
• All code quality tools/guidelines have been run/followed
• All relevant assets have been compiled

[FenPWysocki]

Removed -r esm flag - The script uses CommonJS, so the ESM loader wasn't needed and was causing conflicts.

Added pathToFileURL - This is the correct Node.js built-in method to convert file system paths to proper URLs, which is required for dynamic import() on Windows.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 43.52%. Comparing base (e89a37d) to head (73ed205).
⚠️ Report is 58 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2708      +/-   ##
==========================================
+ Coverage   42.54%   43.52%   +0.97%     
==========================================
  Files         120      120              
  Lines        3145     3180      +35     
  Branches      337      339       +2     
==========================================
+ Hits         1338     1384      +46     
+ Misses       1713     1701      -12     
- Partials       94       95       +1     

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