WIP on io_uring

[yellowhatter]

compile with -F "uring"

---

🏷️ Label-Based Checklist

Based on the labels applied to this PR, please complete these additional requirements:

Labels: enhancement

✨ Enhancement Requirements

Since this PR enhances existing functionality:

• Enhancement scope documented - Clear description of what is being improved
• Minimum necessary code - Implementation is as simple as possible, doesn't overcomplicate the system
• Backwards compatible - Existing code/APIs still work unchanged
• No new APIs added - Only improving existing functionality
• Tests updated - Existing tests pass, new test cases added if needed
• Performance improvement measured - If applicable, before/after metrics provided
• Documentation updated - Existing docs updated to reflect improvements
• User impact documented - How users benefit from this enhancement

Remember: Enhancements should not introduce new APIs or breaking changes.

Instructions:

1. Check off items as you complete them (change - [ ] to - [x])
2. The PR checklist CI will verify these are completed

This checklist updates automatically when labels change, but preserves your checked boxes.

[codecov]

Codecov Report

❌ Patch coverage is 62.32558% with 243 lines in your changes missing coverage. Please review.
✅ Project coverage is 71.94%. Comparing base (0682bc5) to head (2a1989b).
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
commons/zenoh-uring/src/reader.rs	74.61%	116 Missing ⚠️
commons/zenoh-uring/src/writer.rs	0.00%	78 Missing ⚠️
commons/zenoh-uring/src/batch_arena.rs	38.63%	27 Missing ⚠️
commons/zenoh-uring/src/page_arena.rs	50.00%	22 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2332      +/-   ##
==========================================
- Coverage   72.10%   71.94%   -0.16%     
==========================================
  Files         390      394       +4     
  Lines       62819    63457     +638     
==========================================
+ Hits        45293    45654     +361     
- Misses      17526    17803     +277     

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