tools: enforce iterator result property order

[trivikr]

Adds a custom ESLint rule to enforce done before value in iterator result objects.

This keeps iterator result object literals consistent across lib/, and includes a fixer
that swaps the properties when they are in the wrong order.

The existing iterator result object literals in lib/ have been updated to match the new rule.

Refs: #63521 (comment)

---

Assisted-by: openai:gpt-5.5

[nodejs-github-bot]

Review requested:

• @nodejs/streams
• @nodejs/url

[codecov]

Codecov Report

❌ Patch coverage is 88.88889% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 90.33%. Comparing base (837910d) to head (d25477b).

Files with missing lines	Patch %	Lines
lib/internal/streams/iter/push.js	75.00%	2 Missing ⚠️
lib/internal/vfs/watcher.js	83.33%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #63526   +/-   ##
=======================================
  Coverage   90.33%   90.33%           
=======================================
  Files         730      730           
  Lines      234205   234205           
  Branches    43927    43931    +4     
=======================================
+ Hits       211559   211560    +1     
+ Misses      14370    14366    -4     
- Partials     8276     8279    +3     

Files with missing lines	Coverage Δ
lib/events.js	99.59% <100.00%> (ø)
lib/internal/fs/promises.js	92.87% <100.00%> (ø)
lib/internal/url.js	93.17% <100.00%> (ø)
lib/internal/webstreams/readablestream.js	98.54% <100.00%> (ø)
lib/internal/vfs/watcher.js	95.20% <83.33%> (ø)
lib/internal/streams/iter/push.js	92.20% <75.00%> (ø)

... and 28 files with indirect coverage changes

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